After a worried email I figured it was best to confirm that yes even if you've won any of my giveaways in the past you can still win again if you enter them.
The winners are chosen at random and the only thing I do is to check it's a valid entry (i.e. you tweeted when you said you did or followed etc).
Good luck you can see all the current giveaways here!
The October book swag one ends in a few hours!