[.uk] Römpp Encyclopedia Natural Products (Rompp Encyclopedia) (ISBN 0865779880)

Nice concise Enclyclopedia:
I read the whole book in under 6 months, just like you would read a Dictionary. I work in the Natural Products field, and this is the Bible of the chemist who works with NatProds. Each entry has tons of references, from isolation to synthesis, to usage. A lot of the most important entries have interesting historical data. A must.