Good insights into the lives of some of the main characters before and after the timeline of Crimson itself - sadly no follow up stories for Agnes or Sugar! But a glimpse via Sophie's chapter. Doesn't kick in until 52% of the way through however!
Was really pleasantly surprised with this as CH back on form and the writing and plot and characters were back to the standard from around books 3-5 before she went off on a mad one and the last few books were very weak but actually this one was great again. Defo give it a go especially if you've read the rest and were maybe thinking of giving up on them.