In this, her third crime novel set in Hawaii, Selma delves into the mystique, history, lure, and romance of coffee while taking the reader on a tour of Oahu.

In Coffee Kapu, modern day criminals pattern their behavior after the notorious criminals of the past. These 21st century bad guys taunt Madam Pele, the legendary goddess of the volcano, and she takes care of them in her inimitable style.

The Days continue to enjoy their vacations in Hawaii and share their observations and experiences even while the criminals wreak havoc.