In the UK, they have bank holidays; in the US this weekend is Memorial Day

, and Kobo is having a sale on various genres for $4.99 or less, with 5 x Super Points. I just recently used a bunch of my Super Points to start getting the Patricia Moyes titles that are being put out by Felony & Mayhem press, whose books only rarely go on sale, and even then, not much of a sale. So I am happy to see the 5 x Super Points. Here's a link to the whole sale - I'm not going to do individual links below:
https://www.kobo.com/us/en/p/memorial18
I've cast a quick eye over the Mystery & Detective part of the sale, and here's what I spotted - using my personal preferences for what to mention, so YMMV

. Because I'm cheap, the ones I'm listing are all under $2.99. Most (all?) are VIP/couponable.
- PennDutch Mystery Series Box Set 1-3, by Tamar Myers is pretty much what it says it is: Too Many Crooks Spoil the Broth; Parsley, Sage, Rosemary and Crime; and No Use Dying over Spilled Milk - all in one omnibus for $0.99. I picked up one of these back in DTB days, but was never really able to get into it, but at this price, I may try again
- A bunch of titles by Sylvia Nobel
- Dead Men Whistling by Graham Masterton, the 9th and most recent (2017) in his Katie Maguire series
- April Fool, the second in William Deverell's Arthur Beauchamp series
- Who Invited the Dead Man? - #3 in Patricia Houck Sprinkle's MacLaren Yarbrough series
- Most or all of the Thea Kozak series by Kate Flora
- Most or all of the Daisy Gumm Majesty series by Alice Duncan - I really like this series, and even the newest upcoming one on pre-sale is only $2.99, while it's at $4.61 at Kindle - so although I rarely do pre-sales, I may do this one
- Track of the Scorpion is the first in the Nicolette Scott series written, according to SYKM, by Robert Irvine (using pen name Val Davis) with his wife, Angie - I read several of these in DTB days and enjoyed them
- North of the Border is the first in the Neil Hamel series by Judith Van Gieson
- Two collections by John McFetridge that are more than $2.99, but have multiple titles in them, so may be worth checking out: one collection has three titles in McF's Toronto series for $4.99, and the other has three titles in his Eddie Dougherty series, also for $4.99
There are also titles by quite a few other authors...please pile in if you think I've missed something of note. And, as I said, I semi-arbitrarily cut my list off at $2.99, which included most, but not all, of the titles on sale, so keep that in mind if your tolerance is a bit higher than mine
Kobo's sale also has a Suspense & Thriller section which I haven't had a chance to look through - and I'm not much of a Thriller person (although Kobo sometimes puts books in some odd categories) - if someone else wants to take a crack at it, please do!