The shark-headed bear-thing

In an alternate 15th century, where dragons roam, sailing ships transform into submarines, and blacksmiths build steampunk robots, ten-year-old orphan Benjamin Blank battles monsters, rescues maidens and discovers fantastic new lands, but never quite manages to get his homework handed in on time. Each adventure sees Ben and his friends, Paradise Little and Wesley Chant, face a new monstrous menace.