Invent To Learn by Sylvia Libow Martinez and Gary S. Stager is the book I am now reading for the Create Make Learn Summer, 2018 course.
This year's Newbery - Hello Universe by Erin Entrada Kelly has a cast of very interesting characters.
Above is an image of one of my favorite books to use to inspire and spur the imagination.
Other invention/imagination-type books that come to mind: Papa's Mechanical Fish by Candace Fleming, If I Built A Car/If I Built A House by Chris VanDusen, Rosie Revere Engineer by Andrea Beaty (and others by this author), The Most Magnificent Thing by Ashley Spires, by What Do You Do With An Idea? by Kobi Yamada, Herve Tullet books (Press Here), and pop-up books (Sabuda and others)...