I've been reading Gardner's Perry Mason books off and on for many years. Those who are used to really fine mystery writers (in the literary sense), such as Ross Macdonald, may find the writing style here a bit dry. Sometiems it's stiff and mechanical. Nonetheless, I still love the general setting: the characters of Perry, Della, Paul, Lt. Tragg, and Hamilton Berger. That, and the ingenious plots, are why I read Perry Mason.
On the whole, the ones written by about 1953 are the best. This is one of the last ones, written in 1963. The plot is interesting and creative. But like many late books, written after the TV series became a huge hit, there isn't much in the way of embellishment or descriptive detail.
Harlan Bancroft is a wealthy man who comes to Perry Mason because he thinks his family is being blackmailed. A blackmail note was sent to his stepdaughter, who is about to marry a socially prominent young man. Bancroft has read it and is sure that the secret threatened to be revealed is the fact that as a youth he was wild and went to prison for a year. The prison chaplain turned him around, and he later became hard working and wealthy. Should this be revealed now before the wedding, his beloved stepdaughter's future would be destroyed.
Mason reads the note and gets an idea of how to put the blackmailers on the defensive. It involves Paul Drake boating on a lake with some "bathing beauty" waterskiers to intercept the blackmail payoff. It works. One of the beautiful skiers, Eve Amory, is an aspiring actress who turns the money over to the police, saying that they just happened to find it while waterskiing. She gets a big writeup in the papers, valuable publicity for her.
But soon the plot thickens and rethickens as first the stepdaughter, then Bancroft's wife, and then Eve Amory all report that they have been contacted by blackmailers or shady characters. Was Harlan Bancroft's early life really what this is all about? Hmm. Several other people have secrets. And what about that gun that has suddenly disappeared?
Mason confronts a blackmailer in a tense scene reminiscent of the 1930s hard-boiled Perry Mason. A murder occurs on Bancroft's yacht moored in a harbor, and Mrs. Bancroft is arrested. Mason has an ingenious idea to trap the real perpetrator.
Good use of Paul Drake. No Lt. Tragg or Hamilton Burger.
Recurring theme: action aboard a yacht moored in a harbor also happens in the Case of the Crooked Candle.
The basic plot is tight and holds together well. Unfortunately there aren't too many real suspects.
Still, one of the better late novels, and definitely recommended.