Capturing the ID of Firebase Object - Advice

I am creating an app that is basically a checklist for my comic books.

I’ve got the app working to the point where it displays all of the Titles. Then I can view all of the issues, and then the actual book.

Now I want to capture whether or not the user has a particular issue. I’m thinking of using local storage rather than storing that information in my Database. I’m not sure which is the better way to go. (I’m not sure I want to make a whole log-in system for my app).

But to do this I want to capture the ID of the book and give it a value of true or false. I’m just having a hard time capturing the ID information of the book. Can someone please point me in the right direction?

A post was merged into an existing topic: Can you help me with Firebase?