Daws Butler, Characters Actor is a biographical book written by Ben Ohmart and Joe Bevilacqua.
It tells of Butler's many years at Hanna-Barbera, beginning with The Ruff and Reddy Show, during which time he proceeded to voice a wide variety of many iconic Hanna-Barbera cartoon characters, including Huckleberry Hound, Lambsey, Yogi Bear, Snagglepuss, Elroy Jetson, and so on, right up to his death in 1988.
There is also an audio CD of all the characters he voiced.