In the UK, Holocaust Memorial Day takes place on 27 January.
It marks the anniversary when soldiers freed people held in a Nazi concentration camp in Auschwitz.
And to reflect this we had some special books to giveaway.
The Boy in the Striped Pyjamas is a brand new book about a young German boy called Bruno - and we had five signed copies to giveaway.
Winners also got a book about Anne Frank, who became famous for writing a diary whilst in hiding from the Germans during World War II.
The lucky winners are:
- Steven, 11, Basildon
- Conor, 10, Honiton
- Tristan, 11, Birkenhead
- Clare, 9, Cambridge
- Delyth, 14, Goodwick
who knew that the Auschwitz concentration camp was in Poland.