Well... this was okay for me. It's a solid read but wasn't what I was expecting. I thought by the cover that this would be a summer type of read... I was dead wrong. While I did like the duel time lines and seeing 10 year differences, I personally couldn't connect to either character. Margot is someone I would never be friends with! She was way to flakey, sneaky, conniving, and fake for my liking. Not sure if that's the look the author was going for but if so, they did a great job at it. I personally would have ended that friendship before it even started. It grated on my nerves the entire time. Meanwhile, I did like Thea. She had her head on straight for the most part and was doing good for herself. But omg, let Margot gooooo is all I kept thinking. The mystery was fine, nothing to write home about. All around it was just a okay read for me and that's ok. 

Told in dual timelines, one set in 1967 and 1977, this book follows Thea, a working-class woman in the Hamptons at ages 20 and 30, and how she defines herself through her relationships with others, specifically her best friend, Margo. Margo is wealthy and fun, but flighty and not trustworthy. The two grow close in the summer of '67 working at a record shop together, but lose touch after a surprisingly dark end to the summer. In '77, Thea is married and has a daughter, and until Margo comes crashing back into her life, they haven't talked in 10 years. 

This was slow-paced, and mostly just focused on building the relationship between Margo and Thea. The twist reason they lost touch was predictable, but the resolution to the present-day timeline was well done and bookended the story well with parallels to the past. However, Thea was a doormat, and Margo was a narcissist. I often enjoy reading stories about bad people, but I didn't get the feeling that I was supposed to dislike Thea, who narrated the story. Her life was depressing, though, and I wanted to shake her when she let people dictate her decisions.

My favorite part of historical fiction is the world-building that helps immerse me in the time period, and some of that was spot-on here, but other things took me out of the story. For example, a scene when the two women are on a sailboat and pull out "Colt 45 beers". Colt 45 is a malt liquor, not a beer, and it's not something I could easily picture two society women in the 70s sipping on their boat. There are a lot of interesting relationship dynamics here, and I think the right person might really enjoy this, especially as a beach or pool read this summer, but it wasn't a memorable read for me. Thanks to NetGalley, the author, and the publisher for the advance copy in exchange for my honest review. 

All the Summers In Between by Brooke Lea Foster is a captivating novel that is full of complex friendships, and coming-of-age stories, and weaves together themes of self-discovery, loyalty, and the power of human connection during a transformative era.

Friendships are complicated, and based on the summary and the foreshadowing, I was waiting for the big devastating incident that made Thea and Margot not talk for ten years. While I found myself interested in the plot, I was not interested in the characters. I wasn't very invested in their friendship forming in our earlier timeline and I definitely wasn't understanding how Thea would drop everything to help Margot after all those years of silence. I'm glad Thea could trust her, because I don't think I could have.
As the story of 1967 unravels, it doesn't make the 1977 timeline make much more sense and just makes Margot look even more manipulative and Thea seem to have even less of a personality.

Thank you to NetGalley and Gallery Books for a copy of this book in exchange for an honest review.