A number of Aaron Elkins titles from his Gideon Oliver and Chris Norgren series, and also some non-series titles, have dropped in price to between $2.99 and $3.99 at Kindle US. The link also picks up a few titles in the Lee Ofsted series that he wrote with his wife, Charlotte, that are long-term priced in this range; and also a new non-series title available for pre-order.
link:
https://www.amazon.com/gp/search/?se...price-asc-rank