Through The Looking Glass
LewisCarroll's books AlicesAdventuresInWonderland and Through the Looking Glass are available online from ProjectGutenberg.
The Annotated Alice : Alice's Adventures in Wonderland and Through the Looking Glass by LewisCarroll, JohnTenniel, MartinGardner
I believe this is the definitive edition. What about ISBN 0393048470?
ISBN 0517029626
Without Martin Gardner's annotation: ISBN 0140367098 or ISBN 0486408787 ... or, with "Alice's Adventures In Wonderland", ISBN 015202199X or ISBN 0451527747.