Charge of the Three-Horned Monster

["Dinosaurs" "Juvenile fiction" "Triceratops" "Time travel" "Fantasy" "Boys" "Best friends" "Fiction" "Picture books" "Fantasy fiction" "Children's fiction" "Dinosaurs fiction" "Boys fiction" "Adventure and adventurers fiction" "Dinosaurios" "Mejores amigos" "Ficción juvenil" "Muchachos" "Jamie Morgan (Fictitious character)" "Tom Clay (Fictitious character)"]