Out of Control by Baynard Kendrick:

Murder disrupts a blind PI’s honeymoon in this mix of detective novel and psychological thriller from the author of Death Knell. (From https://www.fictiondb.com/title/out-of-control~baynard-kendrick~2832326.htm )

Too Many Suspects (published as Vegetable Duck [1944] in Britain) by John Rhode (pen name of Cecil John Charles Street):

The fortieth in Rhode's long-running series of novels featuring Lancelot Priestley, an armchair detective. At the London service flat where she lives with her husband, a woman dies after eating a meal which later analysis shows was infused with digitalis. Scotland Yard at first suspect her husband, who had been called away by a telephone call, of murdering her. However, with the assistance of Priestley, the investigating officer is able to prove this is a long-premeditated crime by someone else. (From https://en.m.wikipedia.org/wiki/Vegetable_Duck )

An Eye for an Eye by Oliver Weld Bayer:

A photographer and a newspaperman combined forces to protect a Frenchman from charges of murder and track down a cigarette case which will lead to hidden fortunes of loyal French. Durand's personal vengeance on enemy collaborationists is covered by Eve, who sets Ralphs to trail him, and through an interlocking of discoveries, Ralph gets traces of the piece of jewelry he wants. (From https://www.kirkusreviews.com/book-reviews/a/oliver-weld-beyer/an-eye-for-an-eye-5/)