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Forrest Mims Electronics Books
By an Amazon.com customer
Timer, Op Amp, and Optoelectronic Circuits & ProjectsTimer, Op Amp, and Optoelectronic Circuits & Projects by Forrest M. Mims III
Buy new: $12.95 / Used from: $25.55
Originally a much thinner booklet from Radio Shack, this has a lot of useful info on 555 timers, 741 (and other general) opamps, and various kinds of optoelectronics (LEDs, CDS cells, etc).
Science  and Communication Circuits & ProjectsScience and Communication Circuits & Projects by Forrest M. Mims III
Buy new: $12.95 / Used from: $10.95
Wireless and light communication. If you're interested, this is an excellent primer.
Electronic Sensor Circuits & ProjectsElectronic Sensor Circuits & Projects by Forrest M. Mims III
Buy new: $12.95 / Used from: $28.00
How-to for various kinds of sensors (light, sound, temp, etc).
The Forrest Mims Circuit Scrapbook, Vol 1The Forrest Mims Circuit Scrapbook, Vol 1 by Forrest Mims
Buy new: $17.78 / Used from: $13.77
Reprints of Mims' articles from Popular Electronics. A must buy if only for the LED oscilloscope.
Getting Started in ElectronicsGetting Started in Electronics by Forrest M. Mims III
Buy new: $19.95 / Used from: $14.96
I'm pretty sure this was the "green book" published by Radio Shack in the 80s and 90s. If you don't know anything about electronics, start here.
Forrest Mims Engineer's NotebookForrest Mims Engineer's Notebook by Forrest Mims
Buy new: $22.41 / Used from: $15.98
The original. Source of the Atari Punk Console. Mecca. Hundreds of great ideas for analog synthesis, Lunettas, etc. Not a lot of detailed notes, so if you're new, make sure you also pick up "Getting Started..." This was originally published by Radio Shack with a yellow cover and gridded newsprint pages.
Electronic Formulas, Symbols & CircuitsElectronic Formulas, Symbols & Circuits by Forrest M. Mims III
Buy new: $12.95 / Used from: $10.98
Excellent, almost pocket, reference. A necessity.
Circuit ScrapbookCircuit Scrapbook by Forrest M. Mims
Buy used from: $21.99
Articles from Modern Electronics. After, I believe, Popular Electronics. Mostly from the early 80s. Because they're articles, there's lots of discussion about the circuit. Great learning resource.