The A to Z of the Philippines provides more than 400 hundred entries on important persons, places, events, and institutions, as well as salient economic, social and cultural aspects. The more than four centuries of the Philippines history covered by Guillermo, including the periods of Spanish and American dominance over the country, is neatly wrapped up in an introduction, clearly laid out in a chronology, complemented with statistical data in the appendix, and concluded with a bibliography allowing further research and study.