Beyond Selidor

So, about a decade late (I'm a shameless bandwagon-jumper, as you know), I started reading George R. R. Martin's A Song of Ice and Fire series. I'm about halfway through the first book, A Game of Throne, and I adore it immensely, but one thing is bugging me.

( cut for spoilers )

Reading this series has rekindled my interest in the Wars of the Roses (I thought I'd never find something to tempt me away from my Angevin and Poitevin obsession). I'm keen to read more books that explore this period of history (either straight historical fiction, or fantasy like A Song of Ice and Fire). Anyone got any suggestions?