A Storm of Swords

In the book A Storm of Swords, by George R.R. Martin, (which is the third book of the "A Song of Ice and Fire" series so there will be spoilers) the setting takes place mostly on the continent of Westeros (a detail map here, it is the continent furthest northwest). Robb Stark, King in the North, has returned from battle in the south and is marching north to retake The North and Winterfell, after it had been put to the torch, from the Iron Men, who had captured it while Robb was at war in the South and had taken most of his force with him. In the south the Riverlands are being watch over mainly by the Tullys from Riverrun, guarding Robb's rear from both the Lannisters and their new allies the Tyrells and the Dornish Men.  All the while Stannis Baratheon is on Dragon Stone "licking his wounds" after a grievous loss on the Blackwater while attempting to put Kings Landing under siege. While the people of Westeros tear at each other, in the west, Daenerys Targaryen is amassing a army from the free cities to reclaim her birth right to the Iron Throne in Westeros. There is the main current events.  It seems very complicated but once you start reading it gets easier to remember all of the houses and characters.  The story is one full of betrayal, turn cloaks, death, and marriages.  It is almost impossible to cover every story line of every character. The book is written in and multi character point of view with the characters of focus changing every chapter.  But this is to be expected when you play The Game Of Thrones.