For the full list of sale titles:
Mysteries and Thrillers from Murder & Mayhem
https://murder-mayhem.com/may-mystery-sale
Here are all of the other categories and URLs for today's Open Road sale:
Literary and Historical Fiction from Early Bird Book
https://earlybirdbooks.com/may-fiction-sale
Science Fiction and Fantasy from The Portalist
https://theportalist.com/may-sff-sale
History and Biography from The Archive
https://explorethearchive.com/may-history-sale
Romance from A Love So True
https://alovesotrue.com/may-romance-sale
True Crime and Horror from The Line Up
https://the-line-up.com/may-true-crime-sale