Open Road Publishing has a number of deals in honour of last week's Edgar Awards ceremony by previous winners which are available for one day only in the US. Available at most retailers. Be quick because I think this may have been for yesterday but prices as of now are still discounted
The Blue Edge of Midnight by Jonathon King $2.99
https://www.amazon.com/Blue-Edge-Mid.../dp/B00BBPVXEU
Slow Motion Riot by Peter Blauner $2.99
https://www.amazon.com/Slow-Motion-R.../dp/B004S8ESIA
The Anderson Tapes by Lawrence Sanders $2.99
https://www.amazon.com/Anderson-Tape.../dp/B00B4V7MWI
The Fugitive by Robert L. Fish $2.99
https://store.kobobooks.com/en-us/ebook/the-fugitive-31
The Bait by Dorothy Uhnak $1.99
https://store.kobobooks.com/en-us/ebook/the-bait-1