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Bunny McGarry is the former Garda detective in Caimh McDonnell's Dublin crime comedies, known for his loyalty, direct methods, and role across connected series.

Billy Harney is the Chicago detective at the center of David Ellis's Black Book crime-thriller series.

Buck Reilly is the former Wall Street trader turned Key West treasure hunter and pilot in John H. Cunningham's Caribbean-set adventure series.

Bianca Dangereuse is the Oklahoma-born stuntwoman and actress at the center of Donis Casey's historical mysteries set in 1920s Hollywood.

Brother Cadfael is Ellis Peters's Welsh Benedictine monk and amateur investigator, solving mysteries around 12th-century Shrewsbury Abbey.

Blade is the 14-year-old narrator of Tim Bowler's young adult thriller series, on the run in a city he calls the Beast.

Bianca Oliver is the lead character in Claudia Gray's Evernight, a young adult paranormal romance set at a vampire boarding school.

Bronwyn is the modern-day witch at the center of Candace Havens's four-book paranormal romance series, where magic, supernatural threats, and romantic complications meet.

Brinna Caruso is the detective at the center of Janice Cantore's Christian police-fiction series, where criminal investigations test both her professional judgment and her faith.

Bev is the amnesiac innkeeper at the center of S. Usher Evans' cozy fantasy mystery series The Weary Dragon Inn.

Brynna is the runaway princess and masked vigilante in S. Usher Evans's young adult fantasy series, forced to balance the throne of Forcadel with her work as the Veil.

Bertie Pollock is a young Edinburgh boy in Alexander McCall Smith's 44 Scotland Street novels, where he contends with his mother's plans for his life.