My Secret War Diary by Flossie Albright is written for children but will delight adults like me! It's absolutely chock full of wonderful journal writing, fold-out letters and cards and drawings. I placed a hold so that I could enjoy every entry and ended up placing an order through the library for my own copy.
Marcia Williams is the author and illustrator of this work, I'll be on the lookout for more of her children's books as I really like her style. I'm going to save further exploring of this title until my own copy arrives but I thought that I would share this with others that may also enjoy books in this format and of this era.