you can read here.
In short, a book trailer is a short video created by students to
highlight the key points of a book. When creating their book trailers
students should be trying to "sell" viewers on a book. To create their
videos your students could use Animoto for Education, JayCut, or PhotoPeach. Learn more about these free video creation tools in my free guide Making Videos on the Web.
Memoov which is a free service that your students can use to create an animated video book review. Memoov allows users to create animated videos up to five minutes in length. Creating an animated video with Memoov can be as simple as selecting a setting image(s), selecting a character or characters, and adding dialogue.
If stop-motion videos are more your speed, Kevin Hodgson's Making Stopmotion Movies is a fantastic resource for directions and advice on making stop-motion movies.
Google Lit Trips has many examples of teachers and students using Google Earth in literature courses. If you're not familiar with how to create placemarks in Google Maps, please see my free guide Google for Teachers for directions.
ZooBurst is an amazing service that allows you to create a short story complete with 3D augmented reality pop-ups. Students could use ZooBurst to create short summaries of books that really jump off the screen.
Glogster allows users to create one page multimedia collages. Students could create a collage containing videos, audio files, text, and images about books they've read. For example, a Glog about Into the Wild could contain images of Chris McCandless, chunks of text about the book, and this video featuring a song from the movie based on the book.