Buster Underground is Caleb Zane Huett's second book in the Buster series. I love following the story of Buster and Tonio, a middle school kid who has anxiety. Tonio can't let anyone know that he can communicate with Buster using underspeak. But things get dicey when someone seems to have it out for the dogs. When Tonio has to befriend a bully as a part of a mission, you'll be on the edge of your seat. Huett writes super fun books for children that will be loved by parents and grandparents alike.