Topsfield, Massachusetts is one of New England's first colonial farming communities, settled in 1639. A number of 18th century homes still stand here, including the home of Olaf and Kristen Krohg. It was built in 1761, and the couple has been working to restore the dwelling's original colonial character. However, they weren’t sure what to do with a contemporary built-in bookcase installed by a prior owner. I decided to help them add some 18th century charm to a 20th century addition that was definitely short on history.