Use LibrarySearch to search for books:
If Keffer Library doesn't own a book you are looking for, request the title through Interlibrary Loan and get it for free.
The books below may help you identify relevant books for your project. Almost all are located in the reference collection at the Keffer Library.
How do I find books for reading level 3.4 (substitute your level)? Mackin is a local company that works with schools and libraries and has an excellent online catalog that will help you identify books at specific reading levels--also Lexile level, Accelerated Reader, or Fountas & Pinnell levels. You need to set up a free account to search their catalog (and then you will need to use LibrarySearch to see what books are available at Keffer). Use the advanced search option to search for reading and interest levels.