Notes
According to the OED, this book contains the first printed use of the word multiverse as used in its modern sense.
WhatCharacter WhatCharacterThe Sundered Worlds (also known as The Blood-Red Game, 1965) by [person:o1HX9fG8EeWAugAeyeRIgw] is British novel. It tells the story of [character:j2cKkgimEeaAugAeyeRIgw] and [character:2-ZtHXT4EeaAugAeyeRIgw] as they partake in an alien competition known as the Blood-Red Game.
According to the OED, this book contains the first printed use of the word multiverse as used in its modern sense.