I understand what's being said but I don't get the context at all...is this a parody of some famous picture?

Otherwise a translation is sort of useless cause it makes no sense.

"This book...I read it long, long ago..."

You ought to add a formal translation box, even if you don't know the context. I can vouch for the accuracy of your translation.

Um... since nobody seems to have done it, I added your translation, sibladeko.

Aha. http://www.nicovideo.jp/watch/sm514357

Here's the answer. Actually in the commercial he just says "Hmm, I've read this before!" It's around 0:40.