Pellucidar

Pellucidar David Innes and Abner Perry venture 500 miles beneath Earth's surface in their "iron mole" drilling machine, discovering a vast hollow world on the inside of Earth's crust. This hidden realm of Pellucidar exists in perpetual daylight, populated by prehistoric creatures and primitive human societies. The series chronicles expeditions through this savage inner world, where time moves differently and compass directions have no meaning under the eternally overhead sun. Multiple adventurers from the surface world find their way to Pellucidar, including Burroughs' famous character Tarzan, each facing the challenges of survival in this primal environment. Burroughs combines elements of science fiction and primordial adventure in this seven-book series published between 1914-1963. The stories present a vision of a complete world hidden within our own, operating under its own physical laws and evolutionary timeline. The Pellucidar series explores themes of civilization versus savagery and humanity's place in nature, while questioning conventional assumptions about progress and time. Through the lens of this impossible world, the books examine what truly separates modern humans from their ancient ancestors.

Readers praise Pellucidar for its imaginative "hollow Earth" setting and fast-paced adventure, though many note it doesn't reach the heights of Burroughs' Tarzan or John Carter series. What readers liked: - Creative prehistoric creatures and civilizations - Quick-moving action sequences - David Innes as a compelling protagonist - World-building details about Pellucidar's physics/environment What readers disliked: - Repetitive plot elements from earlier Burroughs works - Less character development than his other series - Some dated cultural attitudes - Plot holes regarding the hollow Earth concept Ratings across platforms: Goodreads: 3.8/5 (2,800+ ratings) Amazon: 4.1/5 (150+ ratings) LibraryThing: 3.7/5 (400+ ratings) Common reader comment: "Fun pulp adventure if you don't overthink the science, but not Burroughs' strongest work." Several reviews mention the book works best as part of the complete Pellucidar series rather than as a standalone novel.

Journey to the Center of the Earth by Jules Verne A scientific expedition discovers prehistoric creatures and natural wonders while traveling through underground passages to Earth's core.

The Lost World by Sir Arthur Conan Doyle An expedition to a remote plateau encounters living dinosaurs and prehistoric creatures in an isolated region untouched by time.

At the Earth's Core by Edgar Rice Burroughs The first book in the Pellucidar series introduces the concept of the hollow earth and establishes the foundation for the adventures that follow.

The Land That Time Forgot by Edgar Rice Burroughs Survivors of a German U-boat attack find themselves on a lost island where evolution has taken a different path.

The People That Time Forgot by Edgar Rice Burroughs An expedition mounted to rescue survivors leads to encounters with primitive humans and prehistoric creatures on a forgotten island.

🌟 The "Hollow Earth" theory, which inspired the book, was seriously considered by scientists until the late 1800s and had notable supporters including Edmund Halley of Halley's Comet fame. 🦖 Burroughs wrote the first Pellucidar novel, "At the Earth's Core," in 1914, the same year he began writing "Tarzan" stories, showing his remarkable ability to work on multiple series simultaneously. 🌋 The book was influenced by Jules Verne's "Journey to the Center of the Earth" (1864), but Burroughs created a more expansive world with complex civilizations and ecosystems. ⏰ In Pellucidar, time is measured by "sleeps" rather than days, as there is no night in this world due to the central sun - a concept that adds unique challenges for both the characters and the author's storytelling. 🎬 The first book in the series was adapted into a 1976 film starring Peter Cushing and Caroline Munro, though it couldn't capture the full scope of Burroughs' imagined world due to the special effects limitations of the era.