I first discovered the eco-thriller genre – action-packed books focusing on environmental threats – through The Swarm by Frank Schatzing. It’s a somewhat intimidating book because of its length, but extremely well done in action, characterization, and scientific explanation. Ocean creatures begin unexpectedly attacking humans, and it’s up to a diverse set of scientists and environmentalists to figure out what’s causing it and how to stop it. The answer to the puzzle is both bone-chillingly deadly and incredibly beautiful. If you’ve ever felt worried about just how deep the oceans are and how little we know about them, this book will fascinate (and maybe terrify) you.

Inspired by how much I enjoyed The Swarm, I started a quest to read more eco thrillers and see how they compare. Here are my first two contenders and how they measure up.

First: Zoo by James Patterson. This book was made into a TV series a few years ago, though the series only loosely follows the plot of the book. In the book, we follow almost-scientist full-time conspiracy theorist Jackson Oz as he struggles to understand and raise awareness of the rash of animal attacks spreading across the world. He’s aided by beautiful French scientist Chloe along with a host of military and government figures. The picture of humanity’s future that this book paints is chillingly real, to say the least, though honestly the characters are such standard action-movie stock as to be disappointing. In my opinion, it doesn’t measure up to the complex mosiac of The Swarm.

Second: Eden by Tim Lebbon. In this book, Dylan, his daughter Jenn, and their team are escaping the polluted, climate-change-wracked world by an adventurous race across one of ‘The Virgin Zones’: protected swaths of land where no humans are allowed to live or visit. They’re attempting to be the first to cross Eden, the oldest Virgin Zone which has swallowed up many would-be adventurers. Once inside, their adventure turns frightening as the jungle turns against them, a malicious force which might be responsible for the disappearance of Jenn’s mother… This book is very good at building suspense and a sense of horror, getting more gory toward the end as the climax is reached. I wasn’t as convinced by the Nature Personified element or the resolution, but the characters and action are well-drawn. It almost measures up to the Swarm, but not quite.

The one thing all three had in common is a sobering message of warning for humanity: if we abuse our planet and its resources past a certain point, there will be consequences that we’re most likely not prepared for. The realism of that message makes these books heavy material to consider, but moving, important, and thought-provoking. This is a fascinating genre to explore, so stay tuned for a possible part 2!