I can't mail that address, I get a failure message from Google:

We're writing to let you know that the group you tried to contact (errata) may not exist, or you may not have permission to post messages to the group.

I'll post my feedback here:

Hello,

I got the book "Rationality: From AI to Zombies" via intelligence.org/e-junkie for my Kindle (5th gen, not the paperwhite/touch/fire). So far I've read a dozen pages, but since it will take me a while to get to the end of the book I'll give some feedback right away:

• The book looks great! Some other ebooks I have don't use page-breaks at the end of a chapter, don't have a Table of Content, have inconsistent font types/sizes etc. The PDF version is very pretty as well.

• The filename "Rationality.mobi" (AI-Zombie) is the same as "rationality.mobi" (HPMOR)

• A bunch of inter-book links such as "The Twelve Virtues of Rationality"/"Predictably Wrong"/"Fake Beliefs"/"Noticing Confusion" (all from Biases: An introduction) don't work: On my Kindle I have the option to "Follow link", but when I choose it the page refreshes and I'm still at the same spot.

  Inspecting the .mobi source with Calibre e-book reader I see:

  < a href="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" >Noticing Confusion< /a>

  The links from the TOCs and some other chapters do work properly.

• Due to the lack of quotation marks and the nonuse of italics I didn't realize the part "As a consequence, it might be necessary" was a quote (Biases: An introduction). The extra margin left and right do indicate something special, but with the experience of so many bad ebooks my brain assumed it was just a broken indentation level.

• The difference between a link going to the web and one going to a location within the book aren't obvious: one is only a slighter darker grey than the other. In Calibri the links are a nice green/blue, but my kindle doesn't have colours.

Cheers,