Good books still in print?

[Paul Perry]

Hi everyone, I just began building my first modular, and have now finished my
4th module (yeah, I've got a LONG way to go).  Anyways, I'm wondering if there
are any good analog synth design/theory books that are still in print.   I've
been scrounging schematics off the web, but I'd like to have a little theory
to go along with these designs...  Plus, I'd like to design my own circuits
rather than ripping off all the old Moog and ARP circuits.

Thanks in advance

Dave Magnuson