From publisher blurb:
Forces of Nature, Book 1: The Druid is the first in a new series of roleplaying game supplements for 5e from d20pfsrd.com Publishing focusing on wilderness oriented classes, this one focuses on the Druid.
"When nature calls, I reply. When nature speaks, I listen. And when nature angers, I destroy."
This book introduces tons of new options for druids including:
10 New Circles: Circle of Decay, Circle of Fury, Circle of Green Knights, Circle of Swarms, Circle of the Beast, Circle of the Ley Weavers, Circle of the Pack, Circle of the Stalker, Circle of the Trees, and Circle of the Winding Journey
16 New Feats: Animal to Augment, Art of the Kill, Companion of the Wanderer, Designated Survivor, Hardy Wild Shape, Fury of Nature, Focused, Hide of the Forest, King of the Forest, Nature Provides, Oaken Skin, Powerful Friends, Powerful Summoner, Practiced at the Hunt, Preternatural Senses, and Sought Summoner,
5 New Magic Items: Cloak of the Harvest, Mystic Moss, Staff of the Gatherer, Staff of the Pack, and Whistle of Command
1 New Playable Race: Wilderlings
6 New Companion Plant Creatures: Flowering Moss, Gasping Flower, Giant Flytrap, Grabbing Seaweed. Spanking Spruce, and Tumbleweed
21 New Spells: Call of the Earth, Change Race, Cursed Provision, Dust to Dust, Fingers of the Forest, Forest Defenders, Harmful Growth, Heart of Winter, Limb Rot, Nature’s Bounty, Nymph’s Hideout, Overgrowth Armor, Remove from Nature, Return to Nature, Return to the Land, Supernatural Focus, True Power of the Land, Unnatural Growth, Walk with the Beasts, Wild Aegis, and Wooden Guardians