Price drops to $1.99 at Kindle US, not at Kobo US, as of now, at least...
Voyage into Violence, 22nd (SYKM) or 21st (blurb) in the Mr. and Mrs. North series by Richard and Frances Lockridge; repeat - info in this previous post:
https://www.mobileread.com/forums/sh....php?p=3561600
Fire, Burn!, non-series, John Dickson Carr writing as Carter Dickson:
https://www.amazon.com/Fire-Burn-Joh...dp/B00ISH7780/
Old Scores, 3rd in the Chris Norgren series by Aaron Elkins:
https://www.amazon.com/Scores-Chris-...dp/B00J90F0PM/
and two Margery Allingham/Albert Campion titles:
Sweet Danger:
https://www.amazon.com/Sweet-Danger-...dp/B074FJ9RSN/
Hide My Eyes:
https://www.amazon.com/Hide-Eyes-Alb...dp/B074FN1FV1/
As always with Open Road/Mysterious/Ipso, watch for multiple editions of the same titles, so your previous purchase may not show up on the webpage...