She and Twist separated in 1981 and were divorced in 1983 .
Cynthia 's memoir gained renewed interest and went to a third printing of 200,000 copies in the weeks after Lennon 's death .
Lennon and Twist separated in 1981 and were divorced in 1983 .
Cynthia 's memoir gained renewed interest and went to a third printing of 200,000 copies in the weeks after Lennon 's death .