Shiloh Walker's `Hunters' series is one of the best paranormal romance series out there, and "Hunter's Need", the 11th book, is a fantastic addition. For those new to the series, the order of the books is not clear from the titles, but can be found on Walker's website. Although the books can be read individually, I would recommend reading them in order because a great deal of detailed world building occurs in the first several books, and those details aren't repeated in the subsequent books.
Ana Morell is a complex character; when readers were first introduced to her in "Hunting the Hunter", (book 7), her actions lead to the suffering of others, including Duke Lawson. When the heroes of that book rescued Duke, they also saved Ana and her brother Brad, and drew them into the world of the Hunters. Ana views her new world in black and white; the good guys, including the Hunters, are powerful, fearless, heroes, whose actions meet the highest moral standards. Using such criteria she is unable to see her own strengths, and can't forgive her past.
Duke Lawson has been drawn to Ana since the beginning; it's strong, it's inexplicable, and it lead to his torture at the hands of a psychotic vampire. He has needed time to heal, both physically and mentally. When Ana needs help however, Duke must answer his Hunter's call, and they are soon working together to solve a 30-year-old mystery.
Walker does not take the easy way out of Ana's problems and doubts. Her powers don't suddenly metamorph into an offensive weapon, absolution doesn't exist, and love doesn't solve all. Instead, as Duke and Ana struggle to find a killer, Ana must learn to see that the world actually exists in shades of gray, for both Hunter and non-Hunter alike. Watching their development throughout the story is a pleasure.
The mystery is engaging and will keep you wondering, however it would have been even better if it were a bit more developed. Overall, I thought it was more realistic than many mysteries I've read (how often do you write that about a book involving a shape-shifter and a psychic?); the clues aren't just sitting there for them to find, and the answer comes more by accident than design. Perhaps because of that, the end to the mystery comes a bit abruptly. It is resolved in such a satisfying manner, though, that you won't mind.
Duke and Ana, like many of Walker's characters don't fit the typical romance mold, and they are all the more interesting for it. "Hunter's Need" was an excellent read and I can't wait to see what comes next.