From the press-release:
Elvis '72, Bright Summer Nights - features over 150 photographs, many unpublished from his June 1972 tour and on to Las Vegas in August. This hardback book will share insight into these two engagements."
Also, the book "Sessions 4" will be distributed worldwide with the most accurate information of any previous sessions books or websites. It is based on documents and every union contract containing more information that is sure to capture the hearts of every Elvis fan of music enthusiast. The book will be over 1000 pages and over 500 photographs from the first session in Nashville to the last session in Graceland.
source: Joseph Tunzi