Book of maps (5)
I believe the answer is:
atlas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">book of maps</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for atlas that I've seen before include "A geog. book; N. African range" , "Titan compelled by Zeus to support the sky" , "Geographical book" , "African mountain range" , "Map collection" .)