This was kind of an amusing read for me - since the original title of the serial this is adapting is Spearhead from Space, I got this mixed up with the later Pertwee episode 'Terror of the Autons', and it took a few pages of confusion as I wondered why the hell they were folding Pertwee's regeneration into an episode an entire season away. I'm just dumb.
Either way, as opposed to The Faceless Ones, which I reviewed earlier, whilst I have seen Spearhead From Space before, my memory of it is pretty faint, so a lot of the elements of tis book felt relatively fresh to me, though a memory of the episode began to return as I read through. Overall, this is one of those rare adapatations that elevate it's source material. It's just little things, here and there - a first person account of The Third Doctor's regeneration reaction, a great depiction of the Brigadier's gruff, no-nonsense persona, and a chilling, inhume perspective from the book's primary antagonist. Author Terrance Dicks really understands the voices of these characters, both internal and external - unsurprisingly, as he was the script editor of the episode - and whenever his primary, recurring characters like The Third Doctor, The Brigadier, or Liz Shaw spoke, I could hear their actor's voice, clear as day in my head.
The story itself of The Auton Invasion is a relativly stock standard one, mostly remixed by the precense of recently-regenerated Doctor, but Dicks' in how uncomfortable and eerie the inhuman, almost robotic Auton threat is. The real treat of the novel is seeing The Third Doctor deal with his recent regeneration - helped along by a prologue featuring the Second Doctor in his final moments- and exile to the Earth. To be blunt, he's a bit of a prat, constantly trying to escape whatever situation he's found himself in, but this leads to a lot of genuinely hilarious interactions between him and the various members of UNIT who just can't get to grips with the newly regenerated madman.
One of the issues with this era of Doctor Who was it's near total lack of budget. Whilst this lent the series a genuine sense of charm, it did lead to certain events feeling a bit... muffled, so to speak. The titular Auton Invasion, as depicted in the final chapters of the book, felt so localized and small-scale, but the way it's depicted in the book feels like a genuine nightmare, with the entirety of England at stake, feeling more akin to the world-ending threats present in modern Doctor Who episodes. I knew from the start how it ended - how Doctor Who threats always end - but still, the sheer tension of the invasion elevated this book an entire star rating - hats off.
I think my major issue with the book is that, whilst the story he tells and the points of view he employs are really good, I struggle a bit with Terrence Dicks' style of prose. It just really bothers me when an author will swap perspective, point of view, and even location with any kind of paragraph or line break to signify it. I got used to it over the course of the book, but it still threw me for a loop here and there.
The story of The Auton Invasion, even when it was once Spearhead From Space, is fairly standard, but that middling story is uplifted by the fantastic depiction of it's key characters, and a nightmarish, tense account of the titular invasion. Terrance Dicks' prose does has some issues, but I managed to push through it to reach a novel that feels almost quintessentially Doctor Who in nature. Very strong novel debut for the Third Doctor, and absolutely recommended for those with a love for not only this era of Who, but with a love for the series in general.