How many different types of mystery can you think of?

I'm writing (and researching) John's Joy at the moment, a book of children's stories based on Revelation. I know it sounds odd, but I've always loved Revelation, and the more I learn about it the more I love it. So why not try to convey that excitement (and mystery) for kids.

Meanwhile I'm also rewriting my old Hemlock stories, in hopes of getting them published (maybe Ink-Filled Stories will take them, but that's a mystery). I'm compiling my cat tales into Claws for Concern. And I'm editing,...