Q. What is Sora? What is Libby? Are they the same as OverDrive?

Sora is the reading platform (app and website) that schools use to access eBooks and audiobooks from OverDrive. The public library equivalent of Sora is the Libby app. OverDrive is the vender (owner/provider) of Sora and Libby. 

Learn more about Sora here: https://resources.overdrive.com/k-12-schools/how-to-videos/sora/. 
Learn more about Libby here: https://resources.overdrive.com/libby/.