Trudi Canavan 
Doctor Who: Salt of the Earth (Time Trips) [EPUB ebook] 

The Third Doctor and Jo Grant arrive for a well-deserved holiday of sun and blokarting on a salt lake in Australia in 2028. Weird sculptures adorn the landscape statues carved from the salt. People have been leaving them in the salt lakes for years but these look different. Grotesque, distorted figures twisted in pain. They don t last long in the rain and the wind, but they re just made of salt… Aren t they?