I don't know about you but I love, love, love Kevin Henkes. One of my favorite books is Lilly's Big Day. When Lilly's teacher announces his upcoming nuptials, Lilly assumes she's going to be the flower girl. When she hears his neice is going to do it, trouble commences! His books are amazing Mentor Texts. Here are some of the craft moves you can teach with this book: repetition, dialogue, ellipses, font and bold text for emphasis.
I found this great Pinterest board with some good resources on it for you relating to all things Kevin Henkes. He's a great choice for an author study. If you want a quick lesson based on the gradual release, check out this freebie on TPT. Enjoy! Always, Lisa