You may think that since this book is being published in July that it's about the season but it is about a group of four friends that meet in college - Lainey, Tyson, Hannah and Summer. The four become best friends but before college is done Summer has committed suicide. None of the friends no why - yes there was school pressure and she was an athlete that came with pressures but no one suspected a thing. So as the now group of three friends leave college to start their lives they make a pact - the Summer pact - that if anyone of them ever hits rock bottom they promise to drop everything to help each other through the hard times. Part of the pact too is agreeing to share when those hard times hit too and not to fight though them alone.
Many years later Hannah hits rock bottom when she discovers her fiance in bed with another woman. Tyson and Lainey drop all commitments to rush to Hannah's side. Once Hannah's immediate problems are somewhat resolved the three decide they could all use a break from lift and decide on a trip where each person picks where they are going with no veto options for any of them. The three of them have some soul searching to do and some history to process as they head out on their vacation.
The Summer Pact by Emily Giffin was a great read with many unexpected twists. I definitely had empathy for all the characters. I enjoyed reading about their time in Italy as well.