That plugin page gives you a username and password to log into the demo account if you want to look around. All the information is typed directly into fields in wordpress (it doesn’t pull details from outside sources, just uses links). Basically since the book title, author, etc information is used in the plugin, the email subscribers receive just has the review details. So I feel it looks confusing to immediately start an email with “I thought this book…” (for example) without any details about the book.