Because I read many many books I rarely buy individual books these days, I am forever buying more than 1 or omnibus editions of series such as the Gaunts Ghosts omnibus books. Even when buying big collective works such as the Omnibus books I'll buy more than 1 book though because seriously one of those big books lasts me about a week or so :\
The latest 2 books I brought were:
The Ashes of Worlds, Kevin J Anderson's finale to the epic saga of the seven suns.
I also brought:
Don't Stop Me Now, Jeremy Clarkson because frankly the man is almost a God and should be made PM of the UK