The Worst Witch All At Sea is the fourth hilarious adventure in The Worst Witch series.

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 behind her beloved cat, Tabby behind, so she smuggles him along. But keeping Tabby hidden leads Mildred into yet more trouble...

Look out for more of Mildred's disastrous adventures: The Worst Witch, The Worst Witch Strikes Again, A Bad Spell for the Worst Witch, The Worst Witch Saves the Day, The Worst Witch to the Rescue, The Worst Witch and the Wishing Star and First Prize for the Worst Witch.