toptalkedbooks.com offers statistic of how many times a book was mentioned from HN, StackOverflow and reddit. This is the major difference in terms of data.
I've clearly not mentioned What Computers Still Can't Do in comments enough to make What Computers Still Can't Do appear on this list, which is a shame as I love What Computers Still Can't Do, and What Computers Still Can't Do is very relevant to this community of programmers with much technical skill, but little philosophical background.
Currently working in Operations and hence automation and robotics a current fashionable theses, I'm actually genuinely interested in the book What Computers Still Can't Do.
It might help to know that What Computers Still Can't Do (1992) is a slight update to What Computers Can't Do (1972).
This review was written by John Haugeland who in his own right was an influential, pioneering, and much loved name in the field of the philosophy of AI.
Regarding to the low mentions count issue, it is mainly because not many people in the community talked about the same books within a month, looking at the yearly view will get better result, http://toptalkedbooks.com/hackernews/2017
You might consider doing this for research papers cited (although the titles might be harder to find if people don't use the exact title when they cite).
Which bring a question most people are probably interested in: What is the method this site works on?
Great website! I read a book that was recommended on HN probably 6 or 7 years ago and I've spent the longest time trying to remember the name of it. My local library that I borrowed it from doesn't keep checkout history records so they couldn't look it up for me.
I looked at your website and sorted by all-time and found it: "Winning Through Intimidation" by Robert Ringer! I had even remembered the turtle on the cover but still couldnt't find it by Googling. Thanks for the site!
http://hackernewsbooks.com/ http://www.dev-books.com/ http://toptalkedbooks.com/ http://reddittopbooks.com/tech/