Exhibit 10.15



 Exhibit 10.15 
  
 November 17, 2005 
  
 Endeavor Acquisition Corp. 
 180 Madison Avenue, Suite 2305 
 New York, New York 10016 
  
 Ladenburg Thalmann & Co. Inc. 
 590 Madison Avenue 
 34th
Floor 
 New York, New York 10022 
  

	 	Re:	Initial Public Offering 

  
 Gentlemen: 
  
 The undersigned stockholder and director of Endeavor Acquisition Corp. (“Company”), in consideration of Ladenburg Thalmann & Co. Inc.
(“Ladenburg”) entering into a letter of intent (“Letter of Intent”) to underwrite an initial public offering of the securities of the Company (“IPO”) and embarking on the IPO process, hereby agrees as follows (certain
capitalized terms used herein are defined in paragraph 14 hereof): 
  
 1. If the Company solicits approval of its stockholders of a Business Combination, the undersigned will vote all Insider Shares owned by him in accordance with the majority of the votes cast by the holders of the IPO Shares. 
  
 2. In the event that the Company fails to consummate a Business Combination
within 18 months from the effective date (“Effective Date”) of the registration statement relating to the IPO (or 24 months under the circumstances described in the prospectus relating to the IPO), the undersigned will, as soon as
reasonably practicable, (i) cause the Trust Fund (as defined in the Letter of Intent) to be liquidated and distributed to the holders of IPO Shares and (ii) take all reasonable actions within his power to cause the Company to liquidate.
The undersigned hereby waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Fund and any remaining net assets of the Company as a result of such liquidation with respect to his Insider Shares
(“Claim”) and hereby waives any Claim the undersigned may have 







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 in the future as a result of, or arising out of, any contracts or agreements with the Company
and will not seek recourse against the Trust Fund for any reason whatsoever. 
  
 3. In order to minimize potential conflicts of interest which may arise from multiple affiliations, the undersigned agrees to present to the Company for its consideration, prior to presentation to any other person or
entity, any suitable opportunity to acquire an operating business, until the earlier of the consummation by the Company of a Business Combination, the liquidation of the Company or until such time as the undersigned ceases to be a director of the
Company, subject to any pre-existing fiduciary and contractual obligations the undersigned might have. 
  
 4. The undersigned acknowledges and agrees that the Company will not consummate any Business Combination which involves a company which is affiliated with
any of the Company’s executive officers. Furthermore, the undersigned acknowledges and agrees that the Company will not consummate any Business Combination unless the Company obtains an opinion from an independent investment banking firm
reasonably acceptable to Ladenburg that the business combination is fair to the Company’s stockholders from a financial perspective. 
  
 5. Neither the undersigned, any member of the family of the undersigned, nor any affiliate (“Affiliate”) of the undersigned will be entitled to
receive and will not accept any compensation prior to, or for any services rendered in order to effectuate the consummation of, the Business Combination; provided that the undersigned shall be entitled to reimbursement from the Company for his
out-of-pocket expenses incurred in connection with seeking and consummating a Business Combination. 
  
 6. Neither the undersigned, any member of the family of the undersigned, nor any Affiliate of the undersigned will be entitled to receive or accept a
finder’s fee or any other compensation in the event the undersigned, any member of the family of the undersigned or any Affiliate of the undersigned originates a Business Combination. 
  
 7. The undersigned will escrow his Insider Shares for the three year period
commencing on the Effective Date subject to the terms of a Stock Escrow Agreement which the Company will enter into with the undersigned and an escrow agent acceptable to the Company. 
  
 8. The undersigned agrees to be a Director of the Company until the earlier of the consummation by the Company of a Business
Combination or the 







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 liquidation of the Company. The undersigned’s biographical information furnished to the
Company and Ladenburg and attached hereto as Exhibit A is true and accurate in all respects, does not omit any material information with respect to the undersigned’s background and contains all of the information required to be disclosed
pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933. The undersigned’s Questionnaire furnished to the Company and Ladenburg and annexed as Exhibit B hereto is true and accurate in all respects. The
undersigned represents and warrants that: 
  
 (a)
he is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction; 
  
 (b) he has never filed for bankruptcy or been convicted of or
pleaded guilty to any crime (i) involving any fraud or (ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities and he is not currently a defendant in any
such criminal proceeding; and 
  
 (c) he has never
been suspended or expelled from membership in any securities or commodities exchange or association or had a securities or commodities license or registration denied, suspended or revoked. 
  
 9. The undersigned has full right and power, without violating any agreement
by which he is bound, to enter into this letter agreement and to serve as a Director of the Company. 
  
 10. The undersigned hereby waives his right to exercise conversion rights with respect to any shares of the Company’s common stock owned by the
undersigned, directly or indirectly, and agrees that he will not seek conversion with respect to such shares in connection with any vote to approve a Business Combination. 
  
 11. The undersigned authorizes any employer, financial institution, or consumer credit reporting agency to release to
Ladenburg and its legal representatives or agents (including any investigative search firm retained by Ladenburg) any information they may have about the undersigned’s background and finances (“Information”). Neither Ladenburg nor its
agents shall be violating the undersigned’s right of privacy in any manner in requesting and obtaining the Information and the undersigned hereby releases them from liability for any damage whatsoever in that connection. 
  
 12. This letter agreement shall be governed by and construed and enforced in
accordance with the laws of the State of New York, without giving effect to 







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 conflicts of law principles that would result in the application of the substantive laws of
another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of or relating in any way to this letter agreement (a “Proceeding”) shall be brought and enforced in the courts of
the State of New York of the United States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall be exclusive, (ii) waives any objection to such exclusive jurisdiction and that
such courts represent an inconvenient forum and (iii) irrevocably agrees to appoint Graubard Miller as agent for the service of process in the State of New York to receive, for the undersigned and on his behalf, service of process in any
Proceeding. If for any reason such agent is unable to act as such, the undersigned will promptly notify the Company and Ladenburg and appoint a substitute agent acceptable to each of the Company and Ladenburg within 30 days and nothing in this
letter will affect the right of either party to serve process in any other manner permitted by law. 
  
 13. The undersigned acknowledges and understands that Ladenburg and the Company will rely upon the agreements and representations and warranties set forth
herein in proceeding with the IPO. Nothing contained herein shall be deemed to render Ladenburg a representative of, or a fiduciary with respect to, the Company, its stockholders, or any creditor or vendor of the Company with respect to the subject
matter hereof. 
  
 14. As used herein, (i) a “Business
Combination” shall mean an acquisition by merger, capital stock exchange, asset or stock acquisition, reorganization or otherwise, of an operating business; (ii) “Insiders” shall mean all officers, directors and stockholders of
the Company immediately prior to the IPO; (iii) “Insider Shares” shall mean all of the shares of Common Stock of the Company owned by an Insider prior to the IPO; and (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO. 
  
 Richard Y. Roberts 
 Print Name of Insider 
  
 /s/    Richard Y. Roberts 
 Signature 







 Exhibit A 
  
 Richard Y. Roberts will become a member of our board of directors upon consummation of this offering. Mr. Roberts has been a partner
with Thelen Reid & Priest LLP, a national law firm, since 1997. From 1990 to 1995, Mr. Roberts was a commissioner of the Securities and Exchange Commission, and, in this capacity, was actively involved in, has written about or has
testified on, a wide range of subjects affecting the capital markets. Since leaving the Commission, Mr. Roberts has been a frequent media commentator and writer on various securities public policy issues and has assisted the Governments of
Romania and Ukraine in the development of a securities market. From 1987 to 1990, he was the chief of staff for Senator Richard Shelby. He is a member of the Alabama Bar and the District of Columbia Bar. Mr. Roberts is a member of the Advisory
Board of Securities Regulation & Law Reports, of the Advisory Board of the International Journal of Disclosure and Governance, and of the Editorial Board of the Municipal Finance Journal. Mr. Roberts also previously served as a member
of the District 10 Regional Consultative Committee of the National Association of Securities Dealers, Inc., the Market Regulation Advisory Board of the NASD and a member of the Legal Advisory Board of the NASD. Mr. Roberts received a B.S. from
Auburn University, a J.D. from the University of Alabama School of Law and a Master of Laws from the George Washington University Law Center.