Rod R. Butterworth

This has access to over 600 signs of American Sign Language, alphabetical format and an index for easy cross-referencing.

In elementary school, I basically memorized this dang book. I became a fairly good signer just by studying this book, and could carry on basic but lengthy conversations. Somewhere along the way I lost the book, and over the years I've forgotten most of the signs. But I clearly remember how awesome this book was, the illustrations easy to understand and the explanations simple for each sign.