For a vegan athlete, especially a newbie to veganism, these are essential and you will find both these books invaluable
to your newly found vegan health and athetic performance:
by Davis and Melina. The most comprehensive "vegan starter" type of book, which is what you asked for above. You can click here for some info on it: www.veganessentials.com
then click on "Candles and Books" catgeory, then books category, and you will see it.
by Brenden Brazier (a vegan athlete)
As far as webistes, please keep these ones saved in your favourites. Again, they are invaluable resources and you can email them and ask them to send you any info you need and they will gladly do so, usually for free! They are great organizations, indeed my favourites:
(Physicians Committee for Responsible Medicine)
Check them both out!
The foregoing resources will provide you with your foundation for your new vegan lifestyle -- one of the best choices you can make in your life, trust me.