We read this as a family two years ago. It was by far our favorite part of Advent, and the Christmas season. Arnold Ytreeide does such a great job with these books. You read a chapter each night, with the end of the book culminating on Christmas. Although these books have been around awhile, until last year they were out of print. You had to rely on eBay or Amazon, and let me tell you the old supply and demand economics was definitely at work. 
You can imagine my joy when they announced the reprint. Although we had to take last year off, I just couldn't justify $100 for a book I knew I could get for less than $15 in a year. I was chomping at the bit to get our copy of Bartholomew's Passage for this season's Advent. I'm happy to announce our copy has safely made it to the Nomad Pad, and is patiently waiting for the first day of Advent to bring us great joy.
**Note to parents: The opinions about this book are mine, and mine alone. I first heard about these books on the SL-Catholic forum, where people were praising them. HOWEVER, as with everything, not everyone shares the same opinions. After I purchased the first book, I was scared stiff. One woman came out of her blog silence, and railed on and on about how terrible and awful the book was. She felt it was too dark and scary. Now when we read the first one, The General was 10 and Princess was 7 going on 8. My kiddos are pretty sensitive, and we had no problems. Please do read other reviews if you have concerns. End of warning.
Good luck planning your Advent season. If you do decide to go with Jotham's Journey, the first of the trilogy, you can find them here. Let me know what you think.