"The City of Ember" by Jeanne DuPrau keeps students guessing until the very end of this science fiction novel.
I've created higher level thinking discussion questions as well as other questions for students to write in their reading journals. Since I usually have four different reading groups in my classroom, I like having a set of discussion questions to remind me of my thought process as I read the book.
Vocabulary words are also included for each chapter. I list the activities or projects that I use for each chapter. Many of these activities are included in my packet of chapter quizzes (and activities!). Check it out if you like giving your students a packet of questions and activities.