Fair Use rationale for The Legacy of Jihad as provided by the uploader:

This book cover is a single low resolution image of a book being treated in a non-profit online encyclopedia (Wikipedia) article which is seeking to advance knowledge and learning for the benefit of the public.

• Purpose of the use: Nonprofit educational purposes
• Nature of the publication. Basic non profit encyclopedic article on the book
• Amount of the work being used: Low resolution image of the book cover
• Effect on the market: Likely to book publishers's benefit