Note that the book is clearly biased, and mostly based on anecdotal evidence, it seems.
Now, I am also biased, and my bias mostly agrees with the book's, but I am obliged to point it out.
The chemical imbalance theory does seem nonsensical, but I want to see the science (or lack thereof).
Book is Chemically Imbalanced by Joanna Moncrieff - (epub):
https://libgen.li/ads.php?md5=bd38a9e32fde1d6391b86af705cefcf0 (libgen) https://annas-archive.org/md5/40beefd22c94a63791f8b1e2bf787f4e (Anna's Archive)
http://bookszlibb74ugqojhzhg2a63w5i2atv5bqarulgczawnbmsb6s6qead.onion/book/115518677/5a1961/chemically-imbalanced-the-making-and-unmaking-of-the-serotin-myth.html (zlib)
https://bafybeihkklc5j46ez6dgnbst43ebjuqb42xjwi2awjq3a7pb2rv5c5q644.ipfs.dweb.link?filename=Joanna%20Moncrieff%20-%20Chemically%20Imbalanced_%20The%20Making%20and%20Unmaking%20of%20the%20Serotonin%20Myth%20(The%20History%20Press)%20-%20libgen.li.epub (libgen mirror over IPFS)