This one is the best of the Martha books I've read so far along with Sting of the Zygons. Martha sounds like herself not some cut/paste/replace Rose. I liked the setting, colony world. I liked the secondary characters that weren't paper dolls this time. The writer succeeded in making care about Candy, Ty and Orlo and you can forget the cute factor in a good Doctor Who story. This time the real heroes of the story are the otters. Really. Smart, clever and sooo cute. So kudos to this one. Hope the author gets to write another one.