This is one-disk audio book, read impeccably by Elisabeth Sladen who played Sarah Jane Smith in the long-running BBC TV kids' series, spun off from the even longer-running Doctor Who, was excellent fun. Very much in the spirit of the TV show, but separate form it, this story was about an aging fantasy writer, who has just published his last book in his most famous series. Little do Sarah Jane and the young adults she works with, dealing with or even combating alien visitations, realize that another one is going on right under their noses.
Being a big fan of the series, young Rani visits the author with Sarah Jane, but little do they know that the author, because of the alien paper he wrote on, quite literally made up the series - and precipitated it in real life. Before long, there are worm creatures, which can congregate into evil aliens (note unsurprising similarities to season nine of Doctor Who!, which is current as I wrote this.
This story isn't brilliant by any means and the Beeb lards it up with too much special FX, but that aside, the story was a fun romp for youngsters, and I enjoyed revisiting one of the most loved companions of The Doctor, who died long before her time. The only companion so far to have had her own spin-off series. RIP Elisabeth. You will never be forgotten.