They also have another 3-on-1 for £1.96 - Rockin' Renaissance / Angry Aztecs / Terrible Tudors. There's also 6% cashback through quidco.
Horrible Histories has proved to be one of Britain's best selling series of books ever written. It is particularly popular with children who enjoy wicked, woeful and weird tales from the past. It's history with the nasty bits left in!