Those pesky digital sprites have been chewing through the binary code... eBook versions of May releases will be unavailable on the website until tomorrow.

We'll be using today to perform a little fixing operation. Basically the website was getting befuddled and was confusing ePubs with PDFs. While we chase the goblins away, May's releases will be unavailable to buy as eBooks.

But fear not, the digital files will be back tomorrow and everything will be running as normal!

We apologize for any inconvenience caused, anyone who has received an eBook in the wrong format will be able to re-download the correct version once we're fixed up.