Kill Like a Predator (Maddie's Magic Marker Series #6)

In the Maddie's Magic Markers series, David Mark Lopez gives Maddie some magic markers which really turn out to be magical and they take her on factual historic journeys. In Kill Like a Predator, the sixth book in the series, Maddie's younger brother Brett, discovers the markers and ends up back in the Cretaceous Era and tests his survival skills.