Hi Melanie,
 
How wonderful that you are getting a head-start on preparing your child for kindergarten! There are a number of excellent books on preparing for kindergarten. I pulled these from an article on this site (first resource listed below):
 
Annabelle Swift, Kindergartner by Amy Schwartz.
Despite initial problems, Annabelle turns her first day of kindergarten into a success.
 
Countdown to Kindergarten by Alison McGhee.
A little girl is nervous about her first day of school because she can't tie her shoes.
 
I Am Too Absolutely Small for School by Lauren Child.
This humorous book shows how Lola's older brother allays her fears about starting school.
 
The Kissing Hand by AudreyPenn.
Chester's mom helps him overcome his kindergarten anxiety by showing him a special way to carry her love with him.
 
Look Out Kindergarten, Here I Come! by Nancy Carlson.
Henry can't wait for kindergarten but when he gets to school, he's not so sure he's ready after all.
 
Miss Kindergarten Gets Ready for Kindergarten by Joseph Slate.
This book shows how different animal characters get ready for kindergarten.
 
My Kindergarten by Rosemary Wells.
Bunny heroine Emily goes through her first hundred days of kindergarten. Includes lessons on letters, numbers and science.
 
We also have a number of articles on general kindergarten preparedness. I have included a link to those below, as well.
 
Good luck!
 
L. Compian, Ph.D.
Counseling Psychologist
Education.com