New book (5)
I believe the answer is:
I believe this clue is a double definition.
'new' is the first definition.
(I know that new can be written as novel)
'book?' is the second definition.
(I know that novel is a type of book)
(Other definitions for novel that I've seen before include "Hitherto unknown" , "piece of writing" , "strange possibly" , "Paperback" , "Fresh" .)