J805
5
Hey there 
I’m not in front of my computer right now but let me see what I can do.
So if you set another field from the submit button step 1 you can choose
book title = current page book
Maybe you should label that field as “parentBook” instead of “Book title” as it may be confusing.
Then you can also do this as step 2:
Make changes to a thing > current page book
Add field: “Comments” Add Step 1’s Comment
Let me know if you need me to do screenshots and I can do that later for you.
Want to learn more?
www.nocodeminute.com

I hope that helps! 