Sure is! Diary of a Wimpy Kid is a fictional novel that follows the adventures and daily life of the main character. The books have been loved by many young readers.
Yes. The 'Diary of a Wimpy Kid' series is ongoing. It has managed to maintain its popularity over the years. It chronicles Greg's life through his own eyes in the form of a diary. As time passes in the real world, more books come out that show Greg at different stages of his life, from his early days in middle school to what seems to be his approaching high school years, with new characters being introduced and old relationships evolving, which is a clear indication that it's an ongoing story.