Lou Kuenzler 
My Digger is Bigger [EPUB ebook] 

Rex Rhino roars along in his digger, Charlie Cheetah zooms by in his super-fast motor, and Holly Hornet whizzes right up to the sky in her jet, as the animals compete to find out whose vehicle is best. But it is little Jack the Gerbil who really wows the crowd with his gravity-defying scooter tricks. A riotous rhyming ebook version of the picture book with a fantastic finale!