Fundamentals of Engineering Review (General) New 9th edition (Fundamentals of Engineering, 9th ed)
The "FE" revolutionized license prep. How? By being  tester-friendly in so many ways. It is focused on the exam. It has the  highest author credentials. It is written in an easy-to-read style  that lets you make quick work of your prep. It is the most affordable  all-in-one package.