I bought two books at the same time. The first one is The book of skulls by Robert Silverberg. I already owned it in paperback, but it is a huge book containing four novels and some short stories. I just seized the excuse of the 30 % micropay rebate on fictionwise last week to buy the electronic version. Looking for some excuse to use my reader it seems
The second book was Extras by Scott Westerfeld, fourth volume in the Uglies trilogy (the acknowledgements read:
To everyone who wrote to me to reveal teh secret definition of the word "trilogy" 