I tried really really hard to buy more books with the 50% code. But I think I've pretty much bought everything over the past several months.
I did manage to nab 4 newly couponable books off my various wishlists (highlighted). The rest are all $1.49/$0.99 bargains.
12 books (counting the Gardner bundle as individual titles) @ $11.91 for a $0.99 average
I will get the 2 Kensingtons with the pricing problems if they ever fix them.