Neptune King and the Mysterious Monk

Neptune King and the Mysterious Monk is the 27th book in the series. They're hired by Friar Luigi, a Capuchin monk from a monastery in Devon. Ever since a collection of rare books, diaries and manuscripts arrived at the monastery there has been strange goings on in the night. Each morning they find the library in disarray; the books scattered about or misplaced and sometimes strange noises in the night. When they go to investigate they find nothing and no one. This is puzzling enough, causi...