Is your daughter, able to read or are you reading to her????
My son is in Kindergarten now.
And they too have to read for 15 minutes, or the parent to read to them.
Per my son's Teacher, just read something that your child will enjoy. It is not about the length of the book.
But something that will be enjoyed.
And per their attention spans.
And books with pictures.
And with words, that are short and bigger print (so that the child can follow along with you, as you use your finger to point to each word as you read it).
This is per my Son's, Teacher.
Per my Daughter, when she was in Kindergarten, she was not interested in "chapter books." No way.
She was reading, Junie B. Jones, much later. In 1st and 2nd grade.
"Little Bear" by Maurice Sendak... is also very good.
Or books by Eric Carle. His books comes in various lengths. Long or shorter. For very young children or older. And it has pictures.
The thing is: do you want to read TO your child... OR, have the child be able to look at the words AS you read, and follow along with you as you point to the words... and sounding it out, with her????
I do that with my son... so he can SEE the words being read, AND "read" with me too.
Not just being read, to.
My son follows along as I read, sounding out, each word. Too.