Let me get the negatives out of the way first, there's really only one. The author needs a good editor. I noticed several instances of misspelled words (one on the very first page) or perhaps they were just typos, and the occasional run-on sentence. Then I deliberately quit looking for them to concentrate on the story.
Mr. Suastegui is a fine, fine storyteller. He had me at page one, and my interest never flagged. The main character, Jane McMurtry, is a returned veteran with PTSD. She's damaged both physically - both lower legs blown off by an IED - and mentally, and she knows it. On one level, the story is about her using her dog-handling skills to track and find kidnap victims, both dead and alive. More important are the companion themes of Jane's internal struggle to conquer the personal demons that accompanied her home from Afghanistan, and her relationship with her dogs as she tries to fit herself back into civilian society.
I don't usually like stories written in first person present tense, but Mr. Suastegui makes it work for me. His style is both direct and descriptive at the same time, and his handling of interior dialogue is excellent.
A final note. I don't know the author's background, but if he isn't writing from personal experience with military-trained working dogs, then he is as good a researcher as he is a writer. I'm looking forward to reading more of his work.