No. Copying large portions of something directly would qualify as copyright infringement, summarizing in your own words and quoting small excerpts does not. Ideas cannot be copyrighted.
Only if he quotes large portions rather than summarizing them or rewriting them himself. Copyright applies to the presentation, not to the underlying ideas.
I’m not sure, but isn’t taking the ideas of an author and giving it away for free in this way illegal?
No. Copying large portions of something directly would qualify as copyright infringement, summarizing in your own words and quoting small excerpts does not. Ideas cannot be copyrighted.
Only if he quotes large portions rather than summarizing them or rewriting them himself. Copyright applies to the presentation, not to the underlying ideas.
What jimrandomh and Kaj_Sotala said. :)