MobileRead February 2016 Special Run-Off Vote

From Goodreads:
California lawyer Perry Mason takes client Eva, hated as "all velvet and claws" by his secretary Della Street. Her husband George Belter is behind tabloid editor Locke, blackmail of Congressman Harrison Burke at bungled robbery with Eva, and takes bullet to the heart after bath. Forged will benefits nephew Carl, engaged to secretive housekeeper Veitch's daughter.

From Wikipedia:
The influence of the television series has given the general public the impression that Mason is highly ethical. In the earliest novels, however, Mason was not above skulduggery to win a case. In The Case of the Counterfeit Eye (1935) he breaks the law several times, including manufacturing false evidence (glass eyes). Mason manipulates evidence and witnesses, resulting in the acquittal of the murderer in The Case of the Howling Dog (1934). The Case of the Curious Bride (1934) is
[quote]… a good Perry Mason except for one great flaw, which the author would scarcely have been guilty of later on: he tampers with the evidence, by having a friend move into an apartment and testify to the state of the doorbells. … One is left with the uncomfortable idea that maybe the murder did not take place as Mason reconstructs it.

From Amazon:
Brat Farrar has been carefully coached to assume the identity of Patrick Ashby, heir to the Ashby fortune who disappeared when he was 13. Just when it seems that Brat will pull off the deception, he discovers the truth about Patrick's disappearance, a dark secret that threatens to tear apart the family and jeopardize Brat's carefully laid plans. Called "the best of its kind" by the New Yorker, Josephine Tey's classic is a tale of unrelenting suspense and tension.

From New Statesman:
“Josephine Tey enjoys a category to herself, as a virtuoso in the spurious . . . the nature of the deception on this occasion is too good to give away.”