Tarantulas include some of the biggest, heaviest spiders on Earth. The largest tarantulas are the size of dinner plates. Discover more in Tarantulas, one of the titles in the Spiders series. This series helps young readers explore the different kinds of spiders found around the world. Spiders is a series of AV2 media enhanced books. A unique book code printed on page 2 unlocks your interactive eBook. These books come alive with video, audio, weblinks, slideshows, activities, and much more. Book jacket.