This is the best book I've read about film lighting. There are other excellent books out there on cinematography, each with their own selling point, but "Film Lighting" is akin to a bible - it includes information on nearly every device you'd use and how to use them (as told from the viewpoints of an admirable array of cinematographers and gaffers, such as Robert Elswit, Harris Savides, Janusz Kaminski). The format of the book makes it both insightful and very entertaining, never dry. If you're new to this study this book is a treasure and if you've been messing around for awhile, it's still good to have.