Dianna's book is called "Exploring Irish Music and Dance" and is aimed at introducing children to traditional music, but is well worth a read no matter what age you are.

Sessions in Drogheda - try Carberry's (Ni Chairbre's) on the North Quay. They have sessions on Sundays from about midday 'til 2pm, and also on Tuesday nights. It's a great wee pub, and if you speak any Irish you'll get an even warmer welcome.