Previous book here.
"This book was given to me as a wedding gift by my uncle, Arthur Rushton. In it, I am to record my experiences and impressions. Uncle Arthur made a fine speech of presentation in which he admonished me to remember that the thoughts that we record today will become the treasured historical documents. If this is so, I feel sorry for the future. Every other attempt I have made to keep a commonplace book rapidly degenerated into a list of what happened to my pocket money. This time I will try to do better. I intend to write an account of our wedding journey. But I will be astonished if anyone ever considers it a document of historical interest." -from the commonplace book of the Most Honorable the Marchioness of Schofield (Kate).
This book's pretty fun, and features the two couples from Sorcery and Cecelia on their dual honeymoon trip throughout Europe together. They're accompanied by Kate's mother-in-law Lady Sylvia for part of it, and it just shows how awesome and cool Lady Sylvia is that nobody has a problem with that. Seriously, she's great. Anyway, since the two cousins are together for this trip, the story's told in both (a) Kate's "commonplace book" (journal) and (b) a deposition(!) that Cecelia had to give afterwards. What happened was that as the couples traveled together, they became aware of a certain situation involving old enemies of theirs from the last book, a mysterious religious artifact briefly ending up in the possession of Lady Sylvia, and a nice kid being hauled about by his incredibly dubious tutor to various antiquity sites. They eventually discover that there's a magical plot on to make somebody the magical ruler of all Europe, and are on the trail to thwart that. It's pretty good stuff and I enjoyed it.
I have to say that I especially give props to Kate's writings, which are pretty lively compared to well, Cecilia's deposition. Due to plot reasons alone, we get to hear more schmoopiness with her and her new husband (including hints at nookie, yay for them), and Kate's personal feelings on being afraid of being clumsy in public while being a marchioness, etc. Obviously Cecy's not putting those levels of details in a freaking deposition, but it makes Kate more fun to read this go-round. I also enjoyed a new revelation about Kate regarding her personality traits, both good and bad. You've probably figured it out already given that magic runs in families, but it does lead to future potential.
Anyway, I'll give it four stars, it was a fun trip to read about.