This book is about a little pig, Wilbur, who becomes friends with a spider, Charlotte. Wilbur discovers he is going to be killed around Christmas time, and Charlotte tells him she won't let that happen, so she begins to write words in her web. This becomes an attraction for people to see, and Wilbur is saved.
I would use this book in older grades, such as fourth through sixth. It has many lesson options, such as the anatomy and behavior of a spider. It also has the obvious literary elements to analyze, such as plot, main characters, and cause and effect.