Like their other books, it seems the book will feature many images taken through the parks 35 year history along with text recounting the history of the park.
From the book description:
Since opening in 1980, Sesame Place theme park in Langhorne, Pennsylvania, has been the Northeast’s premier destination for fun, learning, and entertainment for children and adults alike. This wonderful playland has seen immense change and growth from opening day, ever adapting like Sesame Street itself to engage the newest generation of kids. Here, the original Muppets™ from Sesame Street created by Jim Henson, such as Big Bird, Grover, and Cookie Monster, as well as the newer residents, such as Elmo, Zoe, Murray, and Abby Cadabby, come right out of the television and into attractions, shows, parades, meet-and-greets, and more.
Author Guy Hutchinson and Christopher Mercaldo Bios:
In its 35th year of operation, Sesame Place has helped guests create countless memories. Explore and see in vivid color its development from concept to reality, its early days of interactive science exhibits and discovery, its growth and addition of watery fun, and its more recent additions of great theme park rides and attractions. Authors Guy Hutchinson, a theme park writer and broadcaster, and Chris Mercaldo, a theme park and attraction designer, are two avid Sesame Place fans (who grew up visiting the park in different eras) who detail its rich history and importance in both pop culture and the Northeast.The 96 page book will be released on July 6, 2015. We'll keep you posted when it's available to pre-order!