The Isle of Battle is book two of Sean Russells' 'Swans War' Saga. It is a continuation to 'The One Kingdom' and so obviously isn't a book to read 'stand-alone'.
This book takes the characters from the first book and weaves them even more deeply into the world in which they inhabit. After their initial journey from book one, the heroes find themselves travelling through a hidden swamp called 'The Stillwater', (for reasons I won't spoil here) and that is where the majority of the book takes place, while the other chapters of the book are spent going deeper into the political issues regarding the eternally fueding Renné and Wills families, but both stories begin to intertwine slowly.
Russells' style is wonderful at slowly revealing more about the characters and story bit by bit throughout the book, while constantly leaving the reader with more questions about them and more reasons to keep reading. You really can't put it down.
New characters are also introduced, leaving the book with an impressive cast, but still the author succeeds in developing each character fully as an individual with their own thougts, feelings, and personalities, all of which integrate seamlessly with the storyline.
The setting itself isn't your typical fantasy setting either, it's much more subtle. Dragons and other such clichéd fantasy concepts don't exist in this world, the sorcerers in the Swans War books have to take time over their spells, and they are legendary beings rather than something every village has at hand. This makes the book a very refreshing read, the plot being subtly and intelligently crafted, though all the political intrigues going on can get slightly confusing at times.
Overall though, this is a great book just like its predecessor, and those who liked the first would be doing themselves an injustice to miss this one. Be warned though, as the story doesn't end here, and you will definately be left wanting more!