Please fully read the article: Until circa 2017 the administration thought the notebooks were merely misplaced. As it's a tremendously large library that wasn't

Please fully read the article: Until circa 2017 the administration thought the notebooks were merely misplaced. As it's a tremendously large library that wasn't so difficult to believe, and numerous searches have been conducted over the years to locate the notebooks. Only after a change of management they investigated the circumstances of the disappearing of the books more closely and came to the conclusion that it's more likely they were stolen.