A very interesting book by Andreas Krebs is almost out... although it is (still) only available in the German language.
The author has been working with analog (and other) synthesizers for around 30 years and has already written and maintained a pretty impressive blog.
His " Big Book to the Doepfer A-100 Modular-Synthesizer" will be available at the end of 2011/Now
The book, illustrated with over 400 images, is nice for starters and also very interesting for the more advanced users.
Check out the table of contents HERE (pdf) and some preview pages HERE (pdf)
It is confirmed that an English version of this book is also in the making, but i guess it will take some time before that will be released...
I think i'll just wait for the English version...
Release date : early December 2011
Price: Euro 29,90 € plus shipping
Find more info and ordering details at: http://www.ideenhase.de/html/doepferbuch.html
German version available via Doepfer in early 2012