Firefly & Fern

Jan Burchett, Sara Vogler

Ages 8–12wildlife conservationadventure

Peter Lerangis

Ages 8–12twinssibling teamwork

Steve Hockensmith, Science Bob Pflugfelder, Bob Pfugfelder, MacLeod Andrews, Bob Pflugfelder

Ages 8–13mystery and problem-solvingsibling teamwork

Bob Pflugfelder

Ages 8–12sibling teamworkscience and invention

Gertrude Chandler Warner

Ages 8–12mystery and detective worksibling teamwork

Gertrude Chandler Warner, Aimee Lilly

Ages 7–11mysterysibling teamwork

Gertrude Chandler Warner, Charles Tang

Ages 8–12mystery and detective worksibling teamwork

Mary Pope Osborne

Ages 7–10adventurecourage