Fools Die on Friday Author:Erle Stanley Gardner A Bertha Cool, Donald Lam mystery — If you can add 2 and 2 (and get 4) you can solve this case. It's that simple. — It's so simple, in fact, that even the cops can handle it. — Look - first you're tipped that a Mr. B will be poisoned - spoon fed by his man-bait wife. — Next - he is poisoned. — Then - the lady vanishes, and it all adds up. — But - ther... more »e's one bit you can't quite figure. The vanished wife was in the house when her husband swallowed the stuff. The cops swear she isn't there now. The house was being watched by a top-drawer detective every second, and he knows she never left.