Shark and Lobster are terrified of tigers. Of course they don’t know for certain what a tiger is or even where it lives, but someone told Shark that they’re dangerous. The naïve duo sets out to build a fortress to protect themselves and soon have the help of an enterprising cuttlefish. The cuttlefish brings along reinforcements, including “some very spiky crabs” and “seven hundred rocks and a piano.” Everyone celebrates the fine fortress they build until doubts about its worthiness send them diving deeper, this time for a monster that will scare the tiger off in an over-the-top, cartoon-style picture book that’s slim on plot but strong on silliness. (Ages 4–7)