Sheer Abandon is mostly engaging and enjoyable but it was nowhere near as entrancing as the Spoils of Time for me so I was slightly let down. The story really picks up through the middle after a slow start but it seems to drag at the end. It took too long to culminate into a climax and a finish for my taste. I found my mind wandering more and more as the story continued to string me along.
I had a difficult time loving the characters. I wanted to choke one or more of them almost the entire way through the book. Nat was my absolute favorite even though he doesn't play a main role. Sweet and funny, he adds an endearing quality to every scene he appears in. I found Kate's adolescent outbursts and obscenities very funny and appreciated the respite her teen angst provided. Clio is a love but Jocasta and Martha are frustrating and often annoying in what I perceived as a lack of growth through the story.
Despite my diminished enthusiasm for Sheer Abandon, I'm still looking forward to reading more from Penny Vincenzi. She writes incredibly well and she has a notable talent for weaving multiple story lines into a cohesive, thought-provoking "whole." I have no doubt that there are many more Vincenzi novels out there that I will adore.
You will find an official plot line description at: https://www.goodreads.com/book/show/668635.Sheer_Abandon.