User blog comment:Chaotic38/Estimated Choices Timeline/@comment-3452092-20181206154606

Endless Summer, Book 2 starts December 27 or 28, 2017. It says in chapter 10 that it has been 4 days since they exited the the portal, which occured at the beginning of the book and it also says that it has been 6 years since Olivia Montoya's death which is time stamped as December 31, 2011. So for your timeline, Book 2 belongs in Winter 2017. It lasts into Winter 2018. since it goes into the new year. I'm not sure of the timeline for Book 3 yet, but it's some time in 2018.