 Horner's 2009 book, "How to Build a Dinosaur", was originally planned for release at the same time as the film as a scientific companion volume.During 2008, Attenborough and Goldblum expressed interest in reprising their roles, although Attenborough suffered a fall at his home later that year and subsequently retired from acting.In a 2008 interview, Johnston discussed the possibility of "Jurassic Park IV", stating that the film's story was completely different from that of its predecessors and would not be set on an island.