Which classic chess books are in the public domain? While looking through Project Gutenberg I noticed that Capablanca's Chess Fundamentals is there (I believe that should mean it is in the Public Domain). I was also able to find Modern Ideas in Chess  by Richard Rèti on line.  

What other famous chess books are in the Public Domain and can be freely posted on a website? or how can I tell whether or not a book I own is in the public domain?
The International Chess Congress, St. Petersburg, 1909 is a classic by World Champion Emanuel Lasker was written in 1910 and is in the public domain. 

[EDIT] ISBN: 1888690097, can be viewed online or downloaded in PDF at http://archive.org/details/internationalche00lask