After finishing The Diary of a Young Girl, I was chatting with a friend and they mentioned flipping through a children's book on Anne Frank that had pictures and more information on the people in her life. So I went looking at the library and found All About Anne by the Anne Frank House. It gives a great historical overview of all the events surrounding Anne Frank's life. I really liked how it even goes into detail on what happened after the diary ends, and how her father dedicated his life to getting her story out there. I also really liked seeing all the pictures (although I was disappointed that there weren't photos of the other inhabitants of the Secret Annex, just Anne's family). It was a little weird though that this book had different names for everyone from what Anne called them in her diary (for example, the family who lived in the Secret Annex with the Franks were the van Pels according to All About Anne, but Anne named them the Van Daans in The Diary of a Young Girl, though Peter was still Peter in both books). This mostly wasn't a problem, but I'm now not 100% sure which girl was Lies in The Diary of a Young Girl.
But all in all, I found this a fantastic supplement to The Diary of a Young Girl, and am very glad to have read it!