iTunes 12.7.2 - How Do I Insert a Digital Booklets to an iTune Album

iTunes 12.7.2 - How Do I Insert a Digital Booklets to an iTune Album

I have about 6 now, I haven't done it in a few years, I think I used iBooks, but that feature is gone now. Does anyone have a step by step list on how to do it now? I can still read my already imported booklets so it must be supported. I appreciate the help. Thanks.

Scott