Variable Star is a 2006 science fiction novel by American author Spider Robinson, based on the surviving seven pages of an eight-page 1955 novel outline by the late Robert A. Heinlein († 1988). The book is set in a divergent offshoot of Heinlein's Future History and contains many references to works by Heinlein and other authors. It describes the coming of age of a young musician who signs on to the crew of a starship as a way of escaping from a failed romance. Robinson posted a note on his website in 2009 noting that his agent had sold a trilogy of sequels based on the novel and its characters. From Heinlein to Robinson The Heinlein Prize Trust selected Robinson to create a novel from Heinlein's outline; the outline, however, lacked an ending. Robinson's publishers encouraged him to write in his own style, not Heinlein's, and the abundance of profanity and puns makes it clear that this is not a Heinlein novel. The outline is almost exactly contemporaneous with Heinlein's juvenile novel Time for the Stars, and shares many of its details, such as the use of faster-than-light telepathic communication between twins. Although Heinlein apparently wrote the outline for Variable Star to be used, like Time for the Stars, as part of his Scribner's juvenile series, Robinson's realization deals with a variety of topics, including drugs and sexuality, that would have been completely unacceptable for a juvenile novel in 1955. Heinlein's original title for Variable Star was The Stars are a Clock. Plot Eighteen-year-old aspiring musician and composer Joel Johnston, a Ganymedean on Earth for his education, falls in love with fellow college student Jinny Hamilton. Both are orphans and poor. When Jinny decides their relationship is ready to progress to marriage, she reveals that she is actually Jinnia Conrad, a granddaughter of humanity's richest man, Richard Conrad. Joel learns that Conrad has already mapped out his future; he is to be groomed for a role in the family business and to produce children to continue the dynasty. Determined to pursue his own destiny, he flees the Conrad estate with the help of Jinny's cousin, seven-year-old Evelyn. To escape the Conrads and their vast reach, Joel joins the crew of the RSS Charles Sheffield. The ship is headed to a distant star on a 20-year voyage to establish a colony, one of several scattered dozens of light-years from Earth. With