Adrian Tchaikovsky’s “The Doors of Eden” is a remarkable science fiction journey that expresses alternative universes and the mysterious creatures they hide. Two companions went looking for creatures on Bodmin Moor four years ago. One has returned but there are concerns about her odd Journey. In the meantime, government physicist Kay Amal Khan studies extraterrestrial gaps that connect several worlds home to strange creatures. The walls between these realities could eventually crumble due to these rifts, with unexpected effects.