The Odyssey of Texas Ranger James Callahan - Hardcover

The Callahan Brothers Trilogy - Paperback

Dirty Harry's America: Clint Eastwood, Harry Callahan, and the Conservative Backlash - Hardcover

Sam Callahan: Death of the Diamond Dolls - Paperback

The Adventures of Stone Callahan - Paperback

I Inc.: Career Planning and Personal Entrepreneurship - Paperback

The Aberrant Lives of Damian Callahan - Paperback

Callahan: Dirty Harry - Paperback

Murder at Pride Lodge: A Kyle Callahan Mystery - Paperback