Buying spree!

I'm on a huge buying spree for Kindle books.  Most of them are the free books from Amazon.  But I've bought a few books for a few bucks each.

My biggest complaint about buying books?  If I request a sample of a book, then buy it, why does it download another book?  I still have the "sample" book too.  Buying a book should automatically remove the sample copy when the full copy downloads.

Most of the free books I'm buying are things I don't plan on reading - at least not for a while.  But this way I've got them handy for reference.  Here's a list of some of the recent free books:
The Age of Chivalry, Bulfinch
Age of Fable, Bulfinch
Beowulf
Bulfinch's Mythology, Bulfinch
Canterbury Tales, Chaucer
Dracula, Stoker
Modern Mythology, Lang
Notes to Shakespeare, Vol III Tragedies, Johnson

Some of these are things you are "supposed to read" as an English student, some of them are "classic" things that people keep talking about that I've never read before.