One very prejudiced book I obtained (5)
I believe the answer is:
bigot
'one very prejudiced' is the definition.
(I know that bigots are very prejudiced)
'book i obtained' is the wordplay.
'book' becomes 'b' (abbreviation for book).
'obtained' becomes 'got' ('get' can be a synonym of 'obtain').
'b'+'i'+'got'='BIGOT'
(Other definitions for bigot that I've seen before include "Racist or sexist?" , "Deeply prejudiced and intolerant person" , "One is prejudiced and intolerant" , "Dogmatist" , "Fanatic" .)