Miami University Online Catalog
Search: As described in the box above.
Get Only Ebooks: In the left-hand column, click on the arrow next to "Material Type" and then check the box next to "eBooks". (red arrow in screenshot)
Change Date Range: by sliding the rule under "Publication Date" or by typing in specific years in the boxes. (red box in screenshot) Your results list will then only include items that were published within your specified date range.
You do not need to read an entire book cover to cover in order to use it as a source in your research assignment.
Look at the table of contents to see if there is a chapter that addresses your narrower aspect of a broader topic covered in a book. For example: Is there a chapter about Ohio's response to the opioid epidemic in a book about the broader national response?
Or you can use the book's index to see which specific pages a book contain information about your topic and read only those pages. (For example: Perhaps a book about the opioid epidemic includes information about Ohio drug courts on pages 72-75).