Behind the Mask in Bloomington, MN

Private detective, Bob Crowder, is the man behind the mask. He had some ingenious ways of ferreting out crime--fighting crooks by acting like a crook!
Erle Stanley Gardner (famous for Perry Mason) wrote four stories about Bob Crowder. We have gathered them all together in this book. Follow his exploits in:
SECOND-STORY LAW
RESTLESS PEARLS
BEHIND THE MASK
THE JACK OF HEARTS