I've been a fan of this series for years & it mostly holds up as an adult reading. More of a YA read than middle grade due to sexual content. There are discussions on good & evil, peer pressure, misogyny, & sex. I enjoyed the setting & retelling of Noah & the Ark. Very clever & entertaining. A bit of deus ex machina, but I let that slide since this is a younger book. L'Engle continues to be one of my favorite writers even after oh so many years.