This book is more of a 3.5 stars, but I rounded it up because I'm feeling nice :D 
 First of all, I felt really connected to this book for two reasons. 1: I'm a competitive swimmer (the protagonist and many of her friends are on the school swim team), and 2: I'm a homeschooler (the male love interest is/was homeschooled). Maybe I just haven't been reading the right kinds of books, but I can't recall ever reading a book about swimmers OR homeschoolers. So that was awesome. 
 Secondly, I loved the themes throughout the book. Genetic mutation and superpowers and cloning and mystery and intrigue and playing God and oh-my-gosh-I-can't-wait-to-see-what-happens-next ... Yes PLEASE. 
 So why am I rating Mindspeak only 4 stars (I mean 3.5)? Well, there's a few reasons. 
 First of all, I found Lexi (the MC) a bit bland. Not a Mary Sue, exactly -- she has flaws -- but she doesn't have much personality (Also, I almost threw my Kindle across the room when I read that she had green eyes. I know that people with green eyes exist (I'm one of them), but it seems like half of all protagonists nowadays have green eyes. Or is it just me? Whatever, it's my personal thoughts here). 
 Secondly, the writing is a little clunky at times. It's certainly not bad enough to be a major flaw, but it's enough to make me notice, so I just thought I'd point it out. 
 Finally, I felt like several chunks of this book could have been cut out without impacting the story at all. There seemed to be a lot of conversations rehashing old discoveries, when I was dying to hear about new developments. 
 Overall, if you're not that bothered about fine writing and you don't get bored easily, I definitely recommend this book. For myself, I liked it enough that I think I'll buy the sequel at some point.