Wordless picture books, believe me, are for ALL ages! In class, the preservice teachers shared wordless picture pictures in small groups. While it would seem a picture book without words would target early childhood or elementary, my students saw (and suggested!) the possibilities for middle grades and high school students. Here’s a short list of their thoughts:
Reading comprehension:
-Even without words, students sequence a story line…Great way to develop what is often referred to as a Story Mountain, where the plot is developed from problem through climax to solution…Inferencing possibilities-no limit!…the strategy of Synthesis!…Summary!…Monitoring Comprehension! We worked all semester with Ellin Oliver Keene’s Mosaic of Thought, 2nd ED 
where seven reading comprehension strategies are presented. I like to save the Wordless Picture Books day for the end of the semester, after students have worked separately with each of the seven strategies (monitoring comprehension, activating schema, inference, questioning, visualizing, determining importance, synthesizing), so they see how each strategy is at work in comprehending the story line of a book with no words.
Writing:
-Students could work together to sketch out a story sequence…to sketch a character map…to add words to each page…the possibilities are endless–
What I enjoy best about this day in class is the conversations in the small groups. The swapping of thoughts, the AHA moments, the laughter, the questioning…IF you teach middle or high school, wordless picture books are a wonderful resource!
Reading and Writing in the Middle 
This is fantastic, thank you so much for sharing so many books without words.