You could use a Book Creator APP for Apple and for Android here.
What to do:
“Book Creator is open-ended, creative and cross curriculum, and is one of the most popular apps for teachers across the world.”
How about you use this app for students to test how much they have mastered a topic.
Students could collaborate — writing, designing, illustrating, editing — on a children’s book that explains a concept in easily graspable text and images.