Reference books are good sources for:
Dictionary of Irish Literature by 
Oxford Companion to Irish Literature by Here are a few examples of books Lavery owns that might be of use during your Research. Note the Call Numbers! All books are shelved according to subject so you can find other books nearby on the shelves.
Irish History can be found using this Call #: DA950
Irish Literature can be found using this Call #: PB1200
Irish Art can be found using this Call #: NA6782
Introduction to Early Irish Literature by 
Ireland, 1798-1998 by The Cambridge History of Irish Literature by 
Companion to Irish Traditional Music by 
American literature will usually be assigned a call number in the "PN" or "PS" range; here's a quick outline of call numbers and their classifications:
PN1-6790 - Literature (General)
PS1-3576 - American Literature
PS126-138 - Biographies
PS147-152 - Women authors
PS185-195 - 17th-18th centuries
PS201-217 - 19th century
PS301-326 - Poetry
PS330-353 - Drama
PS360-380 - Prose
PS430-439 - Humor and satire
PS451-478 - Folk literature
PS700-3576 - Individual
