The Seeds of Doom (in-universe)

The Seeds of Doom was a serial of Doctor Who. David reminisced that the story began when deadly seed pods belonging to the Krynoids were discovered at the South Pole. (PROSE: Fanboys)

It was later novelised by Sarah Jane Smith as part of her Doctor series. It was published in 2000 by Virgin Publishing. It was based on Sarah's adventure with the Fourth Doctor involving Krynoids and Harrison Chase. (PROSE: Moving On)