Do you see the below icon by your book title?
This means we have paused your requests. To release the hold, complete at least one assignment as a reader.
We let new users get a few reviews without having to read themselves. After those few, we require users to 'prove their ability to review' by completing an assignment successfully (this includes Pubby being able to verify that the review is posted)
We've had to implement this policy due to many users turning in assignments without actually writing reviews on Amazon.