Help with various books?

I'm 14 years old, and i'm very interested with things in History. Such as World War 1, World War 2, the Holocaust, Ellis Island, The Mafia and almost anything from the 1950's. But i cannot find a book for adults/ teenagers that are interesting on these specific subject. And i don't want just litte 40 page books about these subjects i want 100-300 page chapter books with characters and a plot. I'm sorry if i'm asking for a lot but i'm so frustrated and i really would like to start reading.