For Lightroom CC/Desktop, the feature is not yet added. You can share this idea/ feature request with us. Please feel free to create an idea/feature request on Adobe Community for other users and developers to see: https://community.adobe.com/. We hope this helps.
As @Ranjisha Sengupta has already explained, there is no dedicated "book module" in the Lightroom desktop app. However, under the Connections tab in the left-hand panel, you will see that it is possible to make a connection to Blurb. Using that connection basically uses Blurb's own BookWright tool to create a book, using a special connection to your cloud-based library where you can choose which images you want to use.