The Doctor & Martha encounter a planet filled with a museum of the last animal of its kind for each animal that has become extinct in the Milky Way galaxy. And each is in suspended animation so that the species doesn't die out. Will the proprietor try to enshrine the last of the Time Lords as well? Will the last dodo be saved by the Doctor?
This was a quick read. There was a bit of bad logic here and there, but the author at least tried to tie up the loose ends at the end, including adding in a faulty android which was supposed to explain the lapse of logic. Just when I thought the story was over, there was a nice surprise extra at the end.
I think I'd give this story 3 1/2 stars, but I'll round down because it really wasn't a 4 star book.