Another of the double Doctor Who books published earlier this year, two 200-page novels bolted together. Baxendale’s Heart of Stone is set in an English farmhouse where things start turning to moon rock, and the Doctor has to put things right – reminded me of that much better YA novel where moon rock starts animating the exhibits in the New York Natural History Museum – can anyone remember its name and author? Death Riders is formula Richards rather than epic Richards, and has a somewhat confused plot of circus folk on an asteroid concealing a deep secret. The two books will be appreciated by younger readers, but otherwise will appeal only to completists like me.