My little finger (well, Peter in fact…) told me that the author of the infamous (and ultimate) "A to Z of Analogue Synthesizers" is on the way to finish his book on effects. If it's on the same league as the AZAS expect: companies histories, product extensive info, advice on the value both in use and on the 2nd hand market, and unknown beasts and white elephants.
Expect the book to be out for sale on the VEMIA site before the end of the year.