THE CASE OF THE STEPDAUGHTER'S SECRET

When it comes to the point of three members of one family consulting Perry Mason independently- each feeling the bite of blackmail, and each fearful for a reason different from the others, even Perry Mason has a complicated affair to untangle. He gets way out on a limb- or let's say in this case a diving board, only to find a further complication in murder. ""When thieves"" (or blackmailers) ""fall out....."" the final solution is quite in line with past successes, but there still seem to be some loose ends that might almost demand a sequel. The usual following, presumably.