He said, maybe it could be released in the future but as of right now "there is no book."
— Peter Sciretta (@slashfilm) July 21, 2017
Michael Siglain is creative director at Lucasfilm Publishing.
J. W. Rinzler’s The Making of Star Wars: The Force Awakens was initially scheduled for release in October 2016, but Lucasfilm eventually canceled it. The book was to reveal some of George Lucas’ original ideas for the sequel trilogy.