I absolutely adored this book, partly because of the story, but chiefly because of David Tennant's wonderful reading voice. For the prose bits he uses his native Scottish accent (which, Scottish accents are beautiful). Then for the seen-on-TV characters, he captures everyone's vocal cadences and styles: Jackie, Rose, Mickey, and the Doctor all sound like themselves. Well, I guess being able to sound like the Doctor is a given. And then he creates distinctly seperate voices for the book-only characters. Especially, the one he adopts for the thing behind all the events (come on, you know there's a thing!) is sheer genius. Original, funny, alien - and perfect! And it was his own idea to voice it like that - nothing in the book implies it spoke unusually, and the author herself was (pleasantly) surprised. It was so mesmerizing, I kept forgetting that every particle of the being's voice and personality was coming out of Tennant, and there wasn't really another being talking.
Story-wise, his timing is spot on, which is especially great for the comic bits (I'm an introvert, yet I couldn't NOT go into public convulsions of laughter at the Doctor's reactions when things went unexpectedly wrong for him). I'm making it sound like it's all comedy, but the overall story is quite serious: someone's running around Rome magically killing people, the Doctor keeps failing to save Rose, there's a gladiator battle of sorts and a bloodthirsty Roman goddess, and of course the Earth is in danger of destruction again. So, you see, it's all around wonderful! I'd meant this to be my last book from Audible, but now I can't leave, because I have to get every other Doctor Who book Mr. Tennant's narrated - even though they're all abridged and I've heretofore avoided abridged books like the very plague - *and* I'm working on getting all the Cressida Cowell ones, too. He was fantastic to watch as the Doctor on TV, but gosh, he's spectacularly good just to *listen* to, too! Cheers!