She's 71, so I assume she's pretty much retired, and can dedicate a lot of time to this (you'd really have to be willing and able to do so to sign up for this). That's about one a day. It seems... doable, though it's obviously a lot.

27 a month?

So, a little less than one a day? That seems eminently doable -- I read more than that in my teens, considerably more sometimes, for years at a time. (Of course I had no internet to distract me: my teens were from about 1977 to 1986.)

I have read the Lord of the Rings trilogy 5 times, Kim Stnaley Robinson's Mars trilogy 6 times, and the entire Frank Herbert _Dune_ series twice. In my early teens, if under time pressure, several times I read about half a dozen novels in an afternoon.

For a retired professional? Sure. I'd be surprised if she couldn't.

Around 1997-1998, I was freelance, not working a lot, and lived with a judge of the Arthur C Clarke award. I read pretty much all the new SF published in the UK both years. A couple of hundred books a year, while working.

If you listen her speak off the cuff about material she has read and respond in real time to random questions you would likely soon come to believe her to have significant powers of recall and comprehension .. in a few languages.

Might explain how she landed a role as Professor of classics at Cambridge, a fellow of Newnham College, Cambridge, and Royal Academy of Arts Professor of Ancient Literature.