Green Sky Series by Zilpha Keatley Snyder

Chosen to become one of a group of civil and religious leaders ruling the land of Green-Sky, thirteen-year-old Raamo's experiences make him question their teachings and lead him to uncover age-old deceptions.

Eight-year-old Teera finds herself above the powerful Root that keeps her Erdling community captive underground. The Erdlings are feared and despised by the Kindar people who live in the massive trees above. Raamo and Neric, two young Kindar discover Teera and for reasons of their own decide to keep her hidden, allowing her to live with Raamo's parents and his sister, Pomma. But Teera's existence does not remain a secret and soon she, Raamo, Neric, and their friends are all in danger... moreEight-year-old Teera finds herself above the powerful Root that keeps her Erdling community captive underground. The Erdlings are feared and despised by the Kindar people who live in the massive trees above. Raamo and Neric, two young Kindar discover Teera and for reasons of their own decide to keep her hidden, allowing her to live with Raamo's parents and his sister, Pomma. But Teera's existence does not remain a secret and soon she, Raamo, Neric, and their friends are all in danger. Published by Atheneum originally in 1979, And All Between is the second book of the Green-Sky Trilogy. less

When the banished Erdlings were brought from their imprisonment below ground and finally reunited with the Kindar it seemed the times of love and joy that the founders of the Green-Sky had promised would at last arrive. But unforeseen problems arose and the result was turmoil, mind pain, unjoyfulness, and a constant fear. Only Raamo held hope for the future. He was proved right, although the path to rejoining lay through surprising sacrifice... moreWhen the banished Erdlings were brought from their imprisonment below ground and finally reunited with the Kindar it seemed the times of love and joy that the founders of the Green-Sky had promised would at last arrive. But unforeseen problems arose and the result was turmoil, mind pain, unjoyfulness, and a constant fear. Only Raamo held hope for the future. He was proved right, although the path to rejoining lay through surprising sacrifice. Originally published by Atheneum in 1980, Until Celebration, a Junior Literary Guild selection, is the final book of the Green-Sky Trilogy. less