Amazon.com has the ebooks of:

Clarkesworld: Year Three
Realms 2: The Second Year of Clarkesworld Magazine
and Realms 1: The First Year of Clarkesworld Magazine

on sale this weekend for $2.99 each!

B&N has price-matched! If you prefer epub editions, get them here:
Clarkesworld: Year Three
Realms 2: The Second Year of Clarkesworld Magazine
and Realms 1: The First Year of Clarkesworld Magazine