It's hard being a little monkey in a big troop, in an even bigger jungle - and this little monkey has had enough of always missing out! She's off to climb to the top of the tallest tree in the jungle and she's going to do it all on her own. Except that there's someone following close behind. Someone with claws and stripes and rather sharp teeth...

Moustache is a flirtatious cat like no other. And curious like all cats. But one day his curiosity played tricks on him and he burned what he loved most: his mustache. Neither short nor lazy, he put on some false mustaches but it was not the solution... the solution was in the hands of a child as curious as he was.

When Mouse takes a stroll through the woods, he meets a fox, an owl, and a snake who all want to eat him! So Mouse invents a gruffalo, a monster with "terrible tusks and terrible claws, terrible teeth, and terrible jaws." But will Mouse's frightful description be enough to scare off his foes? After all, there's no such thing as a gruffalo . . . is there?