The librarian says reference books cannot be checked out and you can put what's called a hold any book that's been checked out. From this, it can be determined that it is not true that one can place a hold on reserve book. (Longman TOEFL iBT CD-ROM)
Is it trying to imply that reserve book is the same as reference book? I can't see any definition for reserve as an adjective. The Harvard Library website defined reserve book as:
Books and other materials for classes are sometimes put on Reserve and are available for a shorter loan period so that everyone in the class can use them.
What does the word reserve book mean? The two sources seems to contradict.