It's a compelling novel, but certainly not a happy one. Around the year 900, a young Irish princess is kidnapped by Vikings and ends up in Iceland as a slave. She's strong-willed and refuses to speak. Historically, it's a fascinating description of the time and people and the conflict between the Vikings and everyone else. The idea that this people just came in and took whomever they wanted--men, women, and especially children--and sold them as slaves is barbaric.