Hello, future me

"Soon-to-be twelve-year-old June is a planner and a problem-solver, and right now she and her friend Calvin are planning a big welcome home celebration for her mother, only her plan falls apart when she finds out that her parents are getting a divorce; June is convinced that she can find some way to get her parents back together--until she starts getting messages on her 'new' laptop (refurbished by a mysterious store called The Shop of Last Resort), messages from JuniePie28 who claims to be her future self, warning her not to interfere in her parent's marriage"--Provided by publisher.