Flaps and a Back Ad of the book

Answering your questions.

Look at any hard cover literature book and notice that

Front flap— a mini-description of a book, 

Back flap i— a photo (if available) and info about the author, 

bottom of the Back flap—Designed by.... you

Illustration by or photography by...

and the info about the publishing house

(logo, name and address)

Back Ad—Praise for this book. 

You can simply copy this info from a different book of the same author and replace the title with the title of your book.

Just try to design it as if it was a real book, but keep the identity of your design.

Olga