I've bought all of Frank Tuttle's previous Markhat the Finder offerings, as well as Wistrel Compleat, and enjoyed them all. Hold the Dark is definitely the longest and most enjoyable of the three Markhat stories.  I added the "sort of" qualifier in the review title because it ticks me off when publishers (I assume they make this decision) add excerpts from other works at the end of a Kindle edition.  Since Kindle edition works have no page numbers, readers use a percentage display to gauge how much of a work they've read.  Hold the Dark ends at 89% of the Kindle document and the last 11% is excerpts from the other two Markhat works, which is ridiculous because they are really just short stories, and from a work by some other author presumably from the same publisher.