A sneaky "big egg" swap leads to a hairy and hilarious hunt for the real
thing! When Mrs. Stigson the Stegosaurus lays an egg there is great
rejoicing Darwin always wanted a baby sister. But leaving mad Uncle
Loops in charge of egg-sitting is not a good idea. On her return, Mrs.
Stigson is certain that it is not the egg she laid. Darwin is determined
to get to the bottom of it and suspects a certain gangster T-rex is
behind the swap. But which is the "real" Stegasaurus egg? And what will
stop Flint Beastwood from smashing it on his wedding day? Jeanne
Willis's madcap characters and story, with Arthur Robins' inspired
illustration, are certain to tickle anyone's funny-bone!"