3,5 for this on. 
 It's really a shame goodreads doesn't half stars as rating, it would come handy for me. Anyway, I liked this fun story. 
 It's always a pleasure to met Rose and Nine, if only in book. But here the best part for me was Das the neanderthal in his future and his pairing with Jack! 
 The go-to-the-future trope isn't new, especially with DW but I love it and Das was just adorable. I almost wished this had been an episode... 
 It's all fun, evil masterplan, back to the past and present. Yep everything good DW has to offer.