I thought Hillel Slovak was the most ####ed up member of the band
which is why he OD'd at 26 before they made it big. But TBH, I don't know much about Frusciante, though his early solo work definitely makes him seem eccentric to say the least.
Not gonna give us a list of your favorite nonfiction music books? C'mon I know you've got at least a few. IIRC you read Azerrad's Nirvana book, although I don't remember what your opinion of it was.