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Sleep Tight is the fourth quest in Power Master 1: A Strange Journey.
To start this quest, the player has to talk to a convict on the second basement floor of Eora Dungeon. He will ask if the player has a Book of Sleep they can use on his wife, to help her fall asleep. Putting the wife to sleep and talking to the husband will end the quest.
The husband will reward the player with a Book of Scorch when his wife is put to sleep.