I've actually gone thru several copies of that book. I seem to meet at least one new person a year that I think should read and give them my copy. Fortunately, it only costs about $8 new, and I've had good luck finding replacements at Baltimore's 'Book Thing' (free book store) whenever I visit the Charm City/Jungle.
You might want to look into some of the books of Thompson's correspondence...interesting letters between him & his odd assortment of friends: Walter Mondale, Jimmy Carter, McGovern, Pat Buchanon, Oscar Acosta, Gary Hart, among others. Large volumes of hit/miss material that is easy to pick & choose from.