Write in the book or on the book
As a reviewer, you should combine an accurate, analytical reading with a strong, personal response. A good book review describes what is on the page, analyzes how the book tried to achieve its purpose, and expresses any reactions and arguments from a unique perspective. Read the book and take notes. You may be trying to write a first line for your book that draws your reader into the story right away and encourages them to turn the page. Or you may be creating i hook write in the book or on the book for a book to promote your book to a publisher or to readers.
Create a strong, engaging description. One of the more effective ways to craft an opening line for your book is to start with a description that is engaging and will leave your reader asking questions.