Electronic Circuits for the Evil Genius by Tom Petruzzellis. Paperback, good used condition. No writing or highlighting. Image is stock photo. From the publisher: “54 super-entertaining projects offer insights into the sights, sounds, and smells of nature Nature meets the Evil Genius via 54 fun, safe, and inexpensive projects that allow you to explore the fascinating and often mysterious world of natural phenomena using your own home-built sensors.”