Today's "$2.99 Open Road mystery author of the day" is Charlotte MacLeod. Only at Kindle US, not Kobo. More than 30 titles across various series and a few non-series.
link for all:
https://www.amazon.com/gp/search/?se...price-asc-rank
P.S. Also includes MacLeod's
Had She But Known: A Biography of Mary Roberts Rinehart - technically not a mystery...