101 Spy Gadgets for the Evil Genius by Brad Graham, Kathy McGowan (2006, Paperback)

Don't waste your money. The book is full of schematics to make "over the counter" products available for purchase now. You better be an electronics specialist to get any benefit from this. The book is constantly giving pages of source code for software apps. Again unusable as far as I can tell. Key loggers Hardware and software available for purchase right now on the internet legally. Do not waste money on this book unless you want to do a fancy science project with your kid. Nothing I saw in the book is better than whats readily available. May cost more to buy it than make it, but my time is valuable which makes buying feasable.If you are totally new to this technology you will learn what kinds of devices are available and the book identifies them and their use.