In February every year, when the children are on half-term holiday, the Methodist Church in Epsom holds a three-day Book Fair. It's well-organised with sections for history, biography, music, and travel. There is also a massive fiction section.
I haven't missed the Fair in five years because it's such an excellent opportunity to build up my own library of research books, particularly out-of-print historical non-fiction. My library is important because although I'm currently to be e-published in contemporary romance, I love history and have written so-far unpolished and unpublished historical romances.