Oh Really? is a Chrome extension developed by colmacompany that helps you save money on eBooks. Have you ever purchased an eBook on Amazon, only to later discover that you already have a free copy of it through your O'Reilly subscription? With Oh Really?, you can avoid this frustration.

This extension works by checking if an eBook exists with O'Reilly and placing a button on the product page of Amazon. When you come across a book that you want to purchase, Oh Really? will display a button that takes you directly to the free version on O'Reilly's platform.

Save money and avoid unnecessary purchases by installing Oh Really? today. It's a free extension that can potentially save you a significant amount of money on eBooks.