In evaluating the collection, you need only comment on the relevant information rather than try to cover the entire book. If an entire book has information relevant to your topic, hit the highlights rather than trying to cover the entire book in an annotation. For journal articles, focus on author qualifications, special features, recency, and references. Keep in mind that the overall purpose of the annotated bibliography is to provide other researchers with enough information about the sources you've gathered to help them evaluate and select from among them. A Sample Annotated Bibliography.
Research suggests that the primary cause for voter apathy is that politicians are boring.
Andrews, Aaron Aardvark. Andrews investigates the prevailing attitude of a large segment of American society that voting is a waste of time. Included in his article are results from a survey of 5000 former voters. Although brief, Andrews' discussion is key to understanding why so many Americans don't vote. Politicians Are Crooks.