From publisher blurb:
There are some rangers unsatisfied by hunting on the ground. This rare breed dons experimental flying tech, taking to the sky at great risk. . The aeronauts eschew mastery of terrain, instead focusing on perfecting their flight. Their knack for tinkering eventually grants them access to the gearhead’s contraption building.
The Aeronaut supplement contains options to take your character to the skies! The aeronaut is an archetype for the ranger focusing on aerial movement and combat.
GMs and players can make use of new feats, equipment, and ranger combat style without having to use the aeronaut archetype. If you want to bring a rocketeer to your game, you need this book!