A few more:

The Wonderful Place, By Chrissy Butler
Mama's Milk by Michael Elsohn Ross
I Love My Mommy Because...by Laurel Porter-Gaylord
I'm Made of Mama's Milk, by Mary Olsen
Baby on The Way, by William Sears M.D., Martha Sears, R.N., and Christie Watts Kelly
What Baby Needs, by Sears, Sears, and Watts Kelly
If My Mom Were A Platypus, Animal Babies And Their Mothers, By Dia Michels
Mama, Mama, by Jean Marzolla
Mariana and the Merchild, a Folk Tale From Chile, by Caroline Pilcher
Hello Baby, by Lizzy Rockwell
Will There Be A Lap For Me? by Dorothy Corey
We Have a Baby, by Cathryn Falwell
We Like to Nurse, by Chia Martin
We Like to Nurse Too, by Mary Young