A rather impressive little ebook from the BBC, downloadable from here – free to people in the UK until 31 July, the rest of us have to pay. Gavin Collinson has assembled the usual material, complete with video clips from both Old and New Who, about the Cybermen, and Joe Lidster supplies a suitably creepy story. Aimed at the 6-12s, but I was pretty satisfied with it myself. Apparently this is by way of being a pilot project to see if there is take-up for it; I hope there will be more.