Here are some great informational alphabet books that you can look at, read and learn to create:

Firefighters A to Z by Chris L. Demerest 
M is for Music by Kathleen Krull 
A Swim Through the Sea by Kristen Joy Pratt 
Touchdown Mars! by Peggy Wethered.  

Here's some more:
Ashley Bran’s ABC of African Poetry  by Bryan, Ashley 
B if for Buckaroo: A Cowboy Alphabet  by Whitney, Louise D. 
Bur Bur’s Boating ABC’s    by Pastel, JoAnne 
Boat Alphabet Book, The    by Pallota, Jerry 
Calypso Alphabet     by Agard, John 
Capital! Washington D.C. from A to Z  by Melmed, Laura Kraus 
G is for Grand Canyon: An Arizona Alphabet by Gwoman, Barbara 
Into the A, B, Sea     by Rose, Deborah Lee 
Jambo Means Hello: A Swahili Alphabet Book by Feelings, Muriel 
Journey Around New York from A to Z  Zschock, by Martha, and Heather 
M is for Music      by Krull, Kathleen 
Mott’s A is for Apple and All Things That Grow by Bryant, Megan E. and Stephens M.Z. 
Ocean Alphabet Book, The    by Pallota, Jerry 
On Your Toes: A Ballet ABC    by Isadora, Rachel 
P is for Passport: A World Alphabet   by Devin, Scillian 
S is for Sunshine: A Florida Alphabet Book  by Crane, Carol 
Skull Alphabet Book, The    by Pallota, Jerry 
Touchdown Mars: An ABC Adventure  by Wethered, Peggy  
Turtle Island ABC     by Hausman, Gerald 
Z is for Zamboni     by Rose, Melanie