I would have classed myself as a bookworm when I was younger, but there's no way I could have read anywhere near that many books in that timespan. I would say that whilst I believe you, you're also an extreme outlier with that figure.

Five and a half books a day, every day, all summer seems high.

What counts as "a book" here (the seven volume À la recherche du temps perdu seems a bit of challenge to rip through in a day) ?

Hah, yeah, see my comment here:

https://news.ycombinator.com/item?id=39331379

Heh - confined for the summer gives a bit of an incentive, sorry about that.

All the same it's a high number, .. I'm guessing more than a few were light pulps and the best you could find given the library at hand?

I read a lot of books, several thousand, from 12 to 17, and kept a log of them - later I worked in (and led) a team that digested a few thousand technical documents a day (with a heavy dose of computer assistence to find|pick out key parts), there's a lot of material you can fly through quickly and not miss much, there are rare books that can take a year or a lifetime to fully digest and finish with.