Elementary library question

I Survived the Sinking of the Titanic, 1912 - Lauren Tarshis


I know most of you are interested in adult books, but I have a question that maybe a few of you could help out with regarding our elementary school library. We have a lot of reluctant readers (as I'm sure all elementary schools do). Many of them love the "I Survived" series by Lauren Tarshis. I'm looking for another series similar to this that might interest them as well. If you have any ideas.... Please let me know. 


The books are historical fiction, about 4th grade level and around 100 pages.


Thanks in advance for any suggestions!!