Yearbooks provide information (facts, summaries, statistics, etc), relating to the previous year. Yearbooks can deal either with a particular region or country, a number of countries, or a particular subject.
Almanacs are similar to yearbooks, in that they may be published annually. Their arrangement is often ad hoc and use of the index is essential. They may include chronologies of events, miscellaneous facts and figures, tables, charts, calendars etc.