The Blue Lagoon

Adapted into a film starring Brooke Shields and Christopher Atkins, this is a romance novel by Henry De Vere Stacpoole, first published in 1908.

In the Victorian period, two young cousins, Richard and Emmeline Lestrange, and a galley cook, Paddy Button survive a shipwreck in the South Pacific and reach a lush tropical island. Paddy cares for the small children and forbids them by "law" from going to the other side of the island, as he found evidence of bloody human sacrifices. He tells them the bogeyman lives there. He also warns them against eating a certain scarlet berry that Emmeline finds.

Paddy soon dies after a drunken binge. Now alone, the children go to another part of the island and rebuild their home. They survive solely on their resourcefulness, and the bounty of their remote paradise. With neither the guidance nor the restrictions of society, emotional feelings and physical changes arise as they reach puberty and fall in love.