by Erin Entrada Kelly is a time travel adventure that also asks bold questions about how much we should know about the future. In 1999 Michael Rosario is turning 12 years old, obsessing about the Y2K crisis that’s supposed to be coming, and pining after his 15-year-old babysitter, Gibby. But when a mysterious teenager named Ridge shows up on Michael’s birthday, Michael soon has more pressing concerns. Ridge is from the future, having time-traveled from the year 2199 through a new and highly controversial new technology, and Michael wants to know secrets from the future. But Ridge is concerned with whether or not he can get home--and is also thrilled to discover things like shopping malls.