Original: Since 1938, Encyclopædia Britannica, Inc. has published annually a Book of the Year covering the past year's events, which is available online back to the 1994 edition (covering the events of 1993).
Simplified: Since 1938, Encyclopædia Britannica, Inc. has published a Book of the Year every year, with information about the past year's events, which is written online since the 1994 edition (with the events of 1993).