Overdrive eBook and eAudiobook Catalog Help



Getting Started:
If you are reading or listening on a smartphone, tablet, or other device with access to the Google Play Store, Apple App Store, or Windows Store, use the Libby instructions.

If you are reading on a Kindle, please use the Kindle instructions. 

If you are using another device, such as a Nook or desktop, please follow this link to the Overdrive help page. 


Using Overdrive in Browser
  1. Visit the OverDrive library collection on your computer or mobile phone, through your library’s website or directly at http://cwmars.overdrive.com.
  2. To log in, click the purple Sign In button in the upper right and choose CW MARS Patrons.
  3. Type in the number on the back of your library card.

Exploring the Collection
  • You can browse book categories from the menu display or use the Search box to find books.
  • Any search can be refined using the filter options.
  • Click on a book cover for more information, including formats and copies available. Kindles can only use Kindle format eBooks.
  • If a title has no available copies you may place a hold and an email will be sent when the title is available.
  • Once you select a book, click borrow; adjust the lending period as desired.
  • Go to your loans page, either through the borrow screen, or using the bookshelf icon at the top of the page. 
  • To read in Browser, the ebook must be available in the Overdrive Read format. Using the left sidebar on a search page, it is possible to limit search results to OverDrive Read.
  • Once you have borrowed an ebook that is available in the OverDrive Read format, you may choose ‘Read Now in Browser’ from the Borrow pop up or when on your Shelf.


Reciprocal Lending Agreement
Your CW MARS library card now works with the eBook and eAudiobook catalogs of several other Massachusetts library networks. Benefits of this include a wider selection of items, including items that CW MARS may not own. There are also potentially shorter waitlists for some items. 

If you check out books using Overdrive in your internet browser, you can sign into each of the other five networks:


  1. Click the ‘Sign In’ button as you would when signing into the CW MARS Overdrive catalog.
  2. Under ‘Choose Location’ select CW MARS Patrons. 
  3. Type in your CW MARS library card number. 
  4. Browse the other library network’s catalog as you would the CWMARS catalog. 

If you are using Libby, you can set up your CW MARS library card in each of the five other networks, using the instructions found on the Libby, By Overdrive page. 



Frequently Asked Questions: 
Do I need an Internet connection?
Only to browse the catalog and to download.

What happens when the title expires?
The title will automatically return themselves, no action is needed on your part.

What if I don’t finish my book?
The app will remember your place, simply check out the title again to resume reading. Your settings control how many past titles are remembered.

Can I renew a book?
Yes! If there are no holds on the title, you can renew two days before it is due. Simply tap on the cover for your details, and tap Renew Loan, then Renew!

Can I return an eBook early?
Yes! Tap the cover, then Return Title to Library, and confirm by tapping Return!