Marie's book club read 42 books over 14 months. How many total months will it take them to read 57 books? Solve using unit rates.

To find the total months it will take to read 57 books, we can set up a unit rate problem.

First, find the unit rate of books read per month:
42 books / 14 months = 3 books/month

Then, divide the total number of books (57) by the unit rate to find the number of months:
57 books / 3 books/month = <<57/3=19>>19 months.

Therefore, it will take Marie's book club a total of 19 months to read 57 books.