So far there are only three books.
The Mysterious Benedict Society and the Perilous Journey and The Mysterious Benedict Society and the Prisioner's Dilemma. There is also a prequel, The Extraordianary education of Nicholas Benedict.
The ISBN of The Mysterious Benedict Society is 9780316057776.
The Mysterious Benedict Society was created in 2007.
The Mysterious Benedict Society is fictional. It doesn't really exist.
440.
Yes and it is called The Mysterious Benedict Society and The Prisoner's Dilemma.
The second book is called The Mysterious Benedict Society and The Perilous Journey.
Yes, it will be about Nicholas Benedict (Mr. Benedict) as a child.
Plaidisbad
I do not think so. However, Trenton Lee Stewart is writing a book on "the education of Nicholas Benedict. For more about this, go to the MBS home page and type in the code "plaidisbad." (From the poem constance wrote about plaid being bad in the third book).
In my book it says 391.
The Extraordinary Education of Nicholas Benedict