Question: How did Shannon Harper collaborate with Madeline Harper to create the Pseudonym of Anna James?

full_context: Document 1: Carolyn Males: Carolyn Males (born 1946), was an American writer and photographer. She wrote romance novels in collaboration under the pseudonyms Alyssa Howard, Clare Richards and Clare Richmond from 1982 to 1993. She also collaborated in non-fiction books and her articles has appeared in Reader's Digest, Travel-Holiday, Brides, Parade, Cosmopolitan, Saturday Evening Post, Odyssey, Writer's Digest, Newsday, The Washington Post, The Baltimore Sun and other publications.
Document 2: Walter Sorrells: Walter Sorrells is an award-winning author of mystery and suspense novels for adults and teens. He has written many novels, including "Fake I.D.", named one of the ten Best Mysteries by Booklist magazine in 2005 and several novels based-on the television series Flight 29 Down. He also writes under the pseudonyms Lynn Abercrombie and Ruth Birmingham. He graduated from Haverford College in 1985, where he majored in History.
Document 3: Marijane Meaker: Marijane Meaker (born May 27, 1927) is an American novelist and short story writer in several genres using different pen names. From 1952 to 1969 she wrote twenty mystery and crime novels as Vin Packer, including "Spring Fire", which is credited with launching the genre of lesbian pulp fiction (although few of Packer's books address homosexuality or feature gay characters). Using her own observations of lesbians in the 1950s and 1960s, she wrote a series of nonfiction books about lesbians under the pen name Ann Aldrich from 1955 to 1972. In 1972 she switched genres and pen names once more to begin writing for young adults, and became quite successful as M.E. Kerr, producing over 20 novels and winning multiple awards including the American Library Association's lifetime award for young-adult literature, the ALA Margaret Edwards Award. She was described by "The New York Times Book Review" as "one of the grand masters of young adult fiction." As Mary James, she has written four books for younger children.
Document 4: Sarah Shannon: Sarah Shannon is a female vocalist best known for her work in the band Velocity Girl. Shannon has released two solo albums: "Sarah Shannon" (2002, Casa Recording Co.) and "City Morning Song" (2007, Minty Fresh). She also joined Styrofoam to record the song "I Found Love." In addition, she fronted the short-lived band Starry Eyes, which put out a short EP and played one live show at the Black Cat club in Washington D.C. Other members of the band included former members of Velocity Girl and Shades Apart. She is currently a member of The Not-Its!, a children's music rock band. Shannon currently lives in Seattle, Washington.
Document 5: Heather Graham Pozzessere: Heather Graham Pozzessere (born March 15, 1953) is a best-selling American writer, who writes primarily romance novels. She also writes under her maiden name Heather Graham as well as the pen name Shannon Drake.
Document 6: The Collected Essays and Occasional Writings of Katherine Anne Porter: The Collected Essays and Occasional Writings of Katherine Anne Porter
Document 7: Shannon Harper: Shannon Harper was a popular United States co-writer of romance novels. During years she collaborated with Madeline Porter by mail, fax machines and their computers to create the pseudonyms: Elizabeth Habersham, Anna James and Madeline Harper. In addition to her partnership with Porter she also co-authored books with Donna Ball as Leigh Bristol and Taylor Brady. She lives in Winter Haven, Florida.
Document 8: Sandra Brown: Sandra Lynn Brown (born March 12, 1948) is an American bestselling author of romantic novels and thriller suspense novels. Brown has also published works under the pen names of Rachel Ryan, Laura Jordan, and Erin St. Claire.
Document 9: Hannah Fielding: Hannah Fielding is an award-winning contemporary Romance fiction writer. Her second book, "The Echoes of Love", won a 2014 Gold IPPY Award for Romance and the Silver Medal for Romance at the 2014 Foreword Reviews IndieFab Book Awards. Her third novel, "Indiscretion", was named the Gold Winner in the Fiction: Romance Category of the 2015 USA Best Book Awards. It also won Gold at the 2016 Benjamin Franklin Awards. "Indiscretion" is the first novel in the "Andalucian Nights Trilogy". The second part, "Masquerade", was published in 2015 as well, and the third part, "Legacy" was published in summer 2016.
Document 10: Donna Ball: Donna Ball (born 1951 in North Georgia, US) is an American writer of over 90 novels, mainly romance novels since 1982, she also signed her novels as Rebecca Flanders, Donna Carlisle and Donna Boyd. She also signed novels with Shannon Harper as Leigh Bristol and Taylor Brady.
Document 11: Nancy Warren (author): Nancy Warren is a Pacific Northwest author of contemporary romance novels. She received her first publication contract after winning Harlequin's 2000 Summer Blaze contest. Since then, she has released 30 novels and novellas, been twice nominated for the Romance Writers of America's RITA Award, and won a "Romantic Times" Reviewers' Choice Award.
Document 12: Jamie Suzanne: Jamie Suzanne (pseudonym) wrote every book in the "Sweet Valley Kids" series and the "Sweet Valley Twins and Friends" series. Jamie Suzanne is the pen name used by multiple ghost-writers of the "Sweet Valley Kids" and "Sweet Valley Twins" book series. The pseudonym is a combination of the names of Francine Pascal’s daughters.
Document 13: John and Michael Banim bibliography: This is a bibliography of the works of John Banim and Michael Banim. Many of their works were published pseudonymously under the name "The O'Hara Family". John used the name Barnes O'Hara, while Michael used the name Abel O'Hara.
Document 14: Shallon Lester: Shallon Nadine Lester is an American author and television personality. She is the central figure in reality show Downtown Girls and blogger for Glamour magazine and a popular video blogger for DoubleAgent.com. In 2008 she published a teen fiction novel, "Hot Mess" co-written with "Slept Away" author Julie Kraut. Her second novel, a collection of humor memoirs called "Exes and Ohs: A Downtown Girl's (Mostly Awkward) Tales of Love, Lust, Revenge and a Little Facebook Stalking", was released June 7, 2011 through Random House.
Document 15: Madeline Harper: Madeline Harper may be the best known joint pseudonym of the American writing team Madeline Porter and Shannon Harper. They have been writing since 1977, when their first book, a Gothic romance, was published as by Elizabeth Habersham. They have also written novels published as by Anna James.
ground_truth: mail, fax machines and their computers