Books I found among maps showing continent (8)
I believe the answer is:
atlantis
'continent' is the definition.
(I've seen this before)
'books i found among maps' is the wordplay.
'books' becomes 'NT' (abbreviation for New Testament).
'found among' indicates putting letters inside.
'maps' becomes 'atlas' (printed collection of maps).
'nt'+'i'='nti'
'nti' inserted into 'atlas' is 'ATLANTIS'.
'showing' is the link.
(Other definitions for atlantis that I've seen before include "Mythical lost land" , "Fabled lost island" , "Mysterious continent" , "Fabled submerged city" , "ancient continent" .)