M.L. Callahan is a sci-fi fanatic and full time writer. Alliance is Callahan's twelfth novel. Fans of Hugh Howey's Wool series, Wayward Pines, Kresley Cole's Immortals After Dark, Sherrilyn Kenyon's League Series, or Karen Marie Moning's Fever Series will not be able to resist Callahan's complex world building, twisting plot lines, or unique premise. Callahan writes something brand new in the science fiction arena with character driven stories that read more like adventure books than hard science manuals. The Timewalker Chronicles are like nothing you've ever read before. Don't miss this book!