About the Author

Mark Gleason, known to many as Big Dawg Mark, is a children’s mystery author who never writes alone—his loyal bulldog Sadie May is always curled up beside him, snoring her approval as each new clue hits the page.

Mark’s love for crime, mystery, and clever problem‑solving goes back to his own childhood, where he devoured detective stories and imagined worlds full of hidden clues and quirky characters. Today, he channels that same excitement into stories young readers can enjoy, crafting adventures that spark curiosity and celebrate courage, friendship, and fun.

Whether he’s brainstorming a new case, sketching out a mischievous raccoon sidekick, or following Sadie May on one of her real‑life backyard investigations, Mark finds inspiration everywhere. Together, the duo brings heart, humor, and a whole lot of bulldog personality to every book they create.