I recently came across this 2019 middle grade fiction book, Hazel’s Theory of Evolution by Lisa Jenn Bigelow, and I honestly can’t recommend it enough. It covers heavy subjects (content warning: including miscarriage) and doesn’t shy away from hard feelings and uncomfortable situations, but it does these things with incredible gentleness, authenticity, and hope. If you’re looking for a warm and wholesome read about family, friendship, and personal growth, you may like Hazel’s Theory of Evolution.

The main character of this book is Hazel, a thirteen-year-old going into 8th grade at a new school, thanks to local redistricting. She refuses to be open or optimistic about this development, determined to keep her head down and “hibernate” her way through one last year before being reunited with her best friend in high school. Unfortunately for her, her best friend grows increasingly distant and mysterious, befriending Hazel’s longtime bully and trying out for cheerleading (which Hazel has always deplored as a ridiculous and sexist activity). Meanwhile, in her new school, a green-mohawked classmate starts pushing his way into her self-isolation, and she makes an unexpected connection with Carina, a fellow transfer looking for a fresh start. At the same time as her social life grows increasingly confusing, her moms announce that one of them, Mimi, is pregnant again…after suffering two miscarriages. Unable to face the agony of hope and loss again, Hazel tries to live in denial: the baby isn’t real until its born safe and healthy. But painful or not, some things can’t be denied or ignored, and Hazel will have to find her way through her new realities.

There are many good things about this book, as mentioned above, including positive representation of multiple identities (ethnic, religious, gender, and sexual identities), and positive parenting: Hazel’s moms do a good job talking to her about her feelings as well as their own, while giving her space to process what she’s going through. I also appreciated reading a modern and well-formed school Health class, complete with discussions of family relationships and positive and comprehensive sex ed. The book is also peppered with Hazel’s articles for the Encyclopedia of Misunderstood Creatures she’s writing, which make delightful educational asides. I recommend this book for a wide range of ages (though be prepared to cry); Hazel has something to resonate with anyone who’s struggled with change and feeling misunderstood or alone in the world.