The Open Door by Margaret Oliphant

A classic ghost story illustrated by acclaimed cartoonist, Seth. Retired officer Colonel Mortimer takes a lease on Brentwood, a mansion in Scotland that shares grounds with the ruins of an older house - including a strange, vacant doorway. When his son falls ill and eerie events begin to unfold, Mortimer must face his fears in order to save his son.
Binding: Paperback / softback