I have put a rather large collection of eBooks about Linux online.
The books originates from the site http://www.900i.me.uk - but due to it's immense success it reached it's bandwidth limit, and has now been taken offline.
Since then several mirros has been put up, and I decided to make one as well, to try to even out the huge load on the mirrors.
The books can be found here: http://linuxbooks.macsat.com