Click on the little triangle to the top left of the book thumbnail (or on the far left of the row if you are in list view).
Select 'Return Item' (or something close to that).
I do not get a return early option. That is the problem.
Thank you!! Jim, that solved my problem too couldn't figure out how although I had seen it once but then couldn't figure out where it was again. Now am good to go.
Jim, many thanks for this very useful reply.
Determined that unless we convrt the book to "Listed View", the triangle to delete, return etc. is not visible.