Books -- if you can't find these locally most are available from Elderly Instruments
The Irish DADGAD Guitar Book -- Sarah McQuaid ( Ossian)
Acompaniment of Irish Music on the Guitar -- Jean Banwarth Includes notation, tablature & chords for a good selection of tunes
Whispering Stones -- Al Petteway ( Mel Bay ) Available at Al's website
Down the Brae -- David Surrette (Mel Bay) with CD
Celtic Crossing -- William Coulter (Mel Bay) Transcriptions from his album
the Acoustic Guitar of Martin Simpson -- ( Accent on Music )
So Inclined -- John Sherman (Mel Bay) with CD.
The Guitar Book -- Pierre Bensusan ( Hal Leonard )
DADGAD Music -- Pierre Bensusan (John August Music, dist. by Mel Bay)
Blarney Pilgrim & Rambel to Cashel--(Mel Bay) both books come with CD and are available at Stefan Grossman's Workshop
Music Celtique -- Soig Siberil (Coop Briezh, France) this may be hard to find.
Irish Traditional Guitar Accompaniment --Galvin Ralston (Mel Bay)
Tune Sources on the Web (mostly in standard notation, single line melody, no tablature) Whenever there's a tune I want to learn & can't figure out by ear (73.857% of the time) I turn to these resources