Simplify the following text for a Grade 12 native English-speaking person.
Original: Twenty Cases Suggestive of Reincarnation is a book written by psychiatrist Ian Stevenson on the phenomena of what he calls spontaneous recall of information about previous lives by young children .
Simplified: Twenty Cases Suggestive of Reincarnation is a 1974 book written by psychiatrist Ian Stevenson on reincarnation research .