Deep Space Spines has a review up for “Star Trek: 39 The Yesterday Saga Book 2: Time For Yesterday“:
Today it’s time for Time for Yesterday, the sequel to one of only a handful of books from the earliest days of the Pocketverse that can unequivocally be called good. When stars begin prematurely going nova, an admiral gets the classic power trio back together to figure out why the Guardian of Forever decided to take a lunch break. But when their freelance help’s attempt at telepathic contact gets her Deebo’d, Spock’s best idea is to recruit his son for the job—but he’ll have to interrupt the Guardian’s DVR recording of Game of Thrones to pull it off. Has Spock mellowed out as a dad? Would the Guardian of Forever be a clingy friend? Can I get my name legally changed to Rorgan Death-Hand? It’s the book where our heroes are running out of time, until they aren’t.