Midworld by Alan Dean Foster
This science fiction novel is set on a lush, exotic planet covered by a dense rainforest, where the native inhabitants live in harmony with their environment. The story follows a young native named Born as he navigates the complexities of his world, Midworld, which is rich in flora and fauna, some of which are sentient. When off-world humans crash land on the planet, Born finds himself in the middle of a conflict that challenges his understanding of his world and its place in the universe. The novel explores themes of environmentalism, colonialism, and the clash between technologically advanced and primitive societies, all while presenting a vividly imagined alien ecosystem.