Mildred Hubble is in deep water on the school trip!

Lovable but disaster-prone Mildred Hubble is possibly the worst ever trainee witch to darken the doors of Miss Cackle's Academy for Witches.

When the class goes for a week's school trip to the seaside, Mildred can't bear to leave her beloved cat Tabby behind, so she smuggles him along. But keeping Tabby hidden leads Mildred into more trouble. . .

The Worst Witch All at Sea is the fourth adventure in Jill Murphy's hilarious Worst Witch series full of fun, magic and mayhem.