For leaning GA tool box, I suppose that Help menu of MATLAB is the best option.

Regarding books you can refer any one like:

1. Practical Genetic Algorithms, 2e, L. Haupt, John Wiley & Sons, Inc.

or

2. Introduction to Genetic Algorithms by S.N. Sivanandam, Springer

This book may help you.

S.N.Sivanandam · S.N.Deepa, 'Introduction to Genetic Algorithms', ISBN 978-3-540-73189-4 Springer Berlin Heidelberg New York

Thank You.

Regards

Suman Debnath

Hi

This book might help you

(2008). Evolutionary Intelligence: An Introduction to Theory and Applications with Matlab [S. Sumathi, T. Hamsapriya, P. Surekha]

This link may point you to the right direction:

http://www.mathworks.com/products/global-optimization/description4.html

This documentation is also useful

http://www.mathworks.com/help/releases/R13sp2/pdf_doc/gads/gads_tb.pdf