When the magic tree house whisks Jack and Annie back in time, they land in the tallest tree in Yosemite, California where they join nature conservationist, John Muir, and US President Teddy Roosevelt on a historic trip through the woods.

"In Courageous Canine, you'll read three true stories of amazing animal heroes. First meet Lilly, a playful pit bull who bravely pulled her owner from the path of a speeding train; two pods of dolphins that saved swimmers from the most powerful predator on the planet; and two gorillas that proved just how alike apes and humans really are. Follow along on their incredible adventures as these awesome animals save the day!"-- Provided by publisher.