The Turquoise Lament is the 15th in the awesome (IMO) Travis McGee series by John D. MacDonald. It has dropped to $1.99 at Kindle and Kobo US. Titles in this series are insanely expensive normally in the US (mostly $8.99 to $12.99) so it’s a treat when one drops in price. So grab this one while you can if you want/need it.