Installing Bookshelf on macOS 10.9 or Later
Download Bookshelf for macOS
Click here to download eVantage Bookshelf for Mac. The VitalSource Bookshelf .Zip will download to your Mac's Download folder.
Go to your downloads folder and locate VitalSource Bookshelf and double-click on it to expand it, if it hasn't unzipped itself.
Double click on the Bookshelf icon to start Bookshelf. If this is your first time you will be asked to confirm that you wish to open Bookshelf. From here you can sign in and use Bookshelf.
Add to Dock
Click and hold on the Bookshelf icon in your dock, then choose Option > Keep in Dock to add Bookshelf to your dock.
To install Bookshelf, go to the Bookshelf menu and choose Quit Bookshelf. You will be presented with a dialog box asking if you'd like to install Bookshelf. Press the Install button and Bookshelf will be moved from your downloads folder to your Applications folder.