This book has lots of adventure and fight scenes, like the Indiana Jones movies that the cover reminds you of. And yet there is time for both main characters to reflect on their feelings for each other, so the reader gets to watch the relationship develop from both perspectives. There is humor, excitement, passion -- the adventure plot and the romance plot are integrated in a way that really works for me. It's clear that their shared adventure is bringing the couple closer together, and yet the demands and dangers of that adventure could also separate them forever. The success of their mission and the success of their relationship become intertwined, in the tradition of the best romantic suspense novels.