There are many sites on the web where you can download a Big Book – the main text of AA called ‘Alcoholics Anonymous’.
Its available online at; AA.org
One I use all the time is only available to USA residents due to copyright.
This is at; The text of Alcoholics Anonymous for Windows, Mac, Palm, Pocket PC and more.
Of course any free AA material you download comes under the 7th Tradition – Self supporting. So make an equivilent donation at your next meetings.