"You take drugs, Danny?"
"Every day."
"Good boy - so, whats the problem?"
This is a clear-eyed take on a wild ride that happened for a lot of creative people, but at the core is Doug Kenney, the Harvard graduate and professional goofball who got heavily into drugs and co-wrote two of the funniest movies ever made (this and Animal House). More importantly he was a major factor in the magazine National Lampoon - which is where it started, the movies came later - as a gigantic force as a writer and editor (mostly as a writer). He isnt the only key character in this saga, but he is the one who forms the emotional nucleus, the one who had the massive brains to go with the putting-ones-fist-into-ones-mouth-for-a-laugh thing.
This is a very good book about not only the making of the film, but the culture of comedy that arose with Kenney and his Lampoon partner Henry Beard, the Second City in Chicago (and Toronto) and of people like Chevy Chase, Dan Aykroyd, Michael O'Donoughue, Anne Beatts, Lorne Michaels (who kinda, sorta, picked all the fresh fruit from the Lampoon that had formed the few years before SNL), and of course Bill Murray and Harold Ramis. But Nashawaty is also excellent at giving context and background to not just them (and Brian Doyle-Murray, whos formative experiences would form the start of Caddyahack), but the other main actors like Rodney, Ted Knight and uh... The other people! (No, seriously, everything with Cindy Morgan is so fascinating). It all adds up to being the remarkable story of a bunch of young people, or those young at heart like Rodney (who didnt know how to do a scene initially as he thought he was bombing due to no laughs on the set), and how they... Made a movie very much of its time but has also stood the test of time.
Id also recommend the documentary on Lampoon/Kenney/et so, DRUNK STONED BRILLIANT DEAD which is on Netflix (the adaptation of the other Kenney bio, A FUTILE AND STUPID GESTURE.... not so much)