"Thankless in Death" by J.D. Robb is a thrilling mystery novel in the "In Death" series, published by Penguin Publishing Group in 2014. This mass market paperback features 400 pages of captivating storytelling in English language. The book combines elements of mystery, detective work, police procedural, women sleuths, and romance with a touch of suspense, making it a compelling read for fans of the genre.