Well, actually, I'm not sure I have a favorite series, maybe The Daughters of Elyon, a really great action series in a wonderful Sci-fi Fantasy mode. Or wait! Maybe The Seven Realms of Ar'rothi with amazing, powerful warrior women in an incredible ,magical world. I did really enjoy the Alex Wolf Credo's series. Great mysteries! I give up. Allison Naomi Holt can work in any genre, and her work is enthralling, entertaining, and exceptional. You can't go wrong with any and all of her books - she never disappoints and always leaves you hoping for more of whatever series you have just finished...