Board Thread:The Reference Desk/@comment-4139960-20131020210544

The pages for the graphic novels, The Chains of Olympus and Hunters of the Burning Stone, both contradict themselves by saying the release date is November 2013 in its infobox, but October 2013 in their Notes sections.

Now, I'm not 100%, but I'm guessing that the release dates on amazon.co.uk are a good gauge for when they actually came out. If so, then both are dated 27 September. Seeing as as of now they're available for delivery by Tuesday as well according to Amazon, it's probably not a November release. 