setting accidental style

[Jon Wild]

Where should I insert the line

#(set-accidental-style 'no-reset)

in my .ly file, in order to have accidentals be remembered across 
barlines?

I tried outside the /book block, inside the /book block but outside the 
/score block, and inside the /score block. Each time I got the error 
"syntax error, unexpected MUSIC_IDENTIFIER"

Thanks  --Jon W.