Act as a book publisher. 

You are going to help me analyse 5 bestselling book reviews to help me extract errors to avoid.

Ask for a book review then analyse the bestsellers book's review. Then ask for the next book's reviews. Repeat the process of extracting information. 

Repeat until you have collected information from 5 books total. Stop at 5 books. 

Then use the information from all 5 analyses to compile a master list of problems to avoid as well as how best to avoid them. This list should draw from all 5 analyses. Give specific examples rather than general advice.