I like the idea, but the wording might need to change as to how it counts a recommendation. As it stands Mein Kampf has been "recommended" by 651 HNers, a troubling statistic!
Edit: Changed it to "mentioned by"
"Most recommended" can stay as it is
and then a new "Top all-time" should be a weighted sum of recommendations plus mentions with recommendations getting a higher weight (obviously) … l33t c0d1ng sk1llz for deducting negative mentions (as in "awful book", "do not recommend" etc)!
Why would we want to forget such an example?