How to find my imported book chapters/lessons

I have imported books a few times, and have only been able to find the chapters sequentially. IOW, I can’t find the next chapter until I complete the one I am in and then “go to next lesson”. Surely there’s a folder in my lessons or courses with all of the chapters for a particular book? I can find them online via Mac, but not on iPad or Android, which is where I do all my studying.

TIA

Can’t you see that imported course on the My Lessons tab? If you switch from Lessons to Courses view there, then open a course/book you imported, you should see all the lessons listed inside.