By now everyone has probably bought most of the open road Katherine Kurtz deals but if you haven't today you can get all three books of "The Legends of Camber of Culdi Trilogy" which are Camber of Culdi, Saint Camber, and Camber the Heretic for $2.99 in the US
https://www.kobo.com/us/en/ebook/the...-culdi-trilogy
Also available at amazon.com, googleplay, applestore and Barnes and noble
edited to add: the price is for the bundle not the individual books so its a really great deal if you haven't already bought them