I am looking for a book for a friend. She describes it as a young boy (possibly a “monster”) goes home for from boarding school for Christmas on a train and discovers the house a secret passage in the back of a closet. There is a map in the back of the book with the secret passageways. She think it came out in the early 90s and was a scholastic title. The family was wealthy. The book was intended for children 9-12. Help!?
Stump the Bookseller
New format, same book stumper solving.
Maybe The Mystery House by Polly Hobson
Expecting to spend a dull vacation in the country, excitment enters 11 year old Marilyn’s lonely existence when four lively children move into the old vacant house next door. Becoming friends, they are surprised to find the house is complete with hidden rooms and strange treasures, and Marilyn sees her fondest wish come true.
https://www.goodreads.com/book/show/6762134-the-mystery-house