The fourth book in the Fire and Ice series and a good read at that. Picking up after the events of A Storm of Swords, this story, like it's predecessors, follows several characters. This time, however, we have some new faces and this is the first book where Jon, Tyrion, and Daenerys, are not characters whose perspective we get to see from. However, unlike some (i.e. Ned, Cateylyn, and Robb), they will show up in the next book. the new faces include Aeron Greyjoy (the Prophet/Drowned Man), Asha Greyjoy (the Kraken's Daughter), Victarion Greyjoy (The Iron Captain/Reaver), Aero Hotah (the Captain of the Guards), Arys Oakheart (The Soiled Knight), and Arianne Martell (The Queenmaker/Princess in the Tower). Arya and Sansa also go through an alias/name change to Cat of the Canals and Alayne respectively on account of Arya's training and Sansa being in hiding after the conclusion of A Storm of Swords.
It's a bit of a change up, but it's not a bad one. Personally, Brienne, Arya, and Jamie's are my favorite parts. Cersei's was interesting too. It may be lacking with some of the characters you've come to like, but I would still recommend reading this book. It also covers season 4 as well as 5 and 6. This is for Adult audiences.