The Very Tiny Baby is included in the category of "Understanding Oneself and Others" in the CCBC Choices 2015 catalog. (Cooperative Children's Book Center. School of Education. University of Wisconsin-Madison.)
Here is the last line of the review:
"The honesty of Jacob's voice and feelings stand out in this informative story illustrated to look like Jacob's own drawings of events as they unfold."
If one must have numbers: Tiny Baby is one of the 259 books chosen out of about 3,500 new books published in 2014.