I have read most of The Boxcar Children series, by Gertrude Chandler Warner. The first book in the series is not a mystery book, the other books are. Henry, Jessie, Violet, and Benny Alden live with their rich grandfather after their parents died in a car accident. They travel to many places including Niagra Falls, the Whitehouse, and many other well-known places, and solve mysteries. The first about ten books are written by the original author, but the next hundred or more books are by different authors.
I rate this series “G”, meaning “Good”. It’s good for all ages, although it’s for children who can read a book that’s 70 – 120 pages. Teens and tweens will most likely find no interest whatsoever in it. I present this book series with the monthly Oldberry Award.