Pellucidar

Set in the imaginative world of Pellucidar, this 1915 fantasy novel by Edgar Rice Burroughs continues the exploration of the Hollow Earth concept. Originally serialized in All-Story Weekly, it features a rich landscape and a detailed map created by the author. The narrative delves into the adventures and challenges faced by characters in this unique realm, blending adventure with the allure of an uncharted world. The book was later published in hardcover in 1923, solidifying its place in the fantasy genre.