<human>:  Ivanka wrote a book that took her 3 more months than it took Woody to write a book. Woody spent 1.5 years writing his book. How many months in total did Ivanka and Woody need to write their books?
<bot>: How many months did Woody take to write his book? ** Woody = 1.5 years = 18 months
How many months did Ivanka take to write his book? ** Ivanka = 18 + 3 = <<18+3=21>>21 months
How many months did Woody and Ivanka take to write their books? ** 18 + 21 = <<18+21=39>>39 months
How many months in total did Ivanka and Woody need to write their books? ** It took Ivanka and Woody 39 months to write their books.
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