Map-book (5)
I believe the answer is:
atlas
I believe this is a double definition.
'map' is the first definition.
(thesaurus)
'book' is the second definition.
(atlas is a kind of book)
(Other definitions for atlas that I've seen before include "One hugely burdened" , "Titan who supported the heavens" , "N. African mountains; a Titan" , "Legendary weightlifter" , "Map collection" .)