Their magic tree house takes Jack and Annie back to a monastery in medieval Ireland, where they try to retrieve a lost book while being menaced by Viking raiders.

The laziest man in all of Ireland catches a leprechaun, who offers a potato seed instead of a pot of gold for his freedom.

A clever woman named Fiona must pass the leprechaun king's tests when she tries to get back all the luck he has locked away from humans.

Fionn Boyle, terrified of the sea, must spend the summer with this older sister, Tara, and their grandfather on Arranmore, an island that has been known to make people disappear, and seems to be restless again.

"Set during the Irish Land Wars (1879-1882) this novel in verse follows Anna Mallon through a series of tragedies as her mother dies, older sibling immigrate to America, and she and her father and sister with special needs are about to be evicted from their farm"--

Deserted by his magic, Fionn Boyle, Storm Keeper of Arranmore, sees the island beginning to wither and illness sweeping the land and must find a way to summon Dagda's army of merrows.

"Artemis is at boarding school in Ireland when he suddenly receives an urgent video e-mail from Russia. In it is a plea from his father, who has been kidnapped by the Russian Mafiya. As Artemis rushes to his rescue, he is stopped by Captain Holly Short of the LEPrecon fairy police. But this time, instead of battling the fairies, he is going to have to join forces with them if he wants to save one of the few people in the world he loves." -- Publisher's...

Ronan Boyle is the youngest and lowest recruit into the secret garda, an Irish police force that tries to stem and stop the misdeeds of unnumbered magical creatures. Ronan is small, has terrible eyesight, suffers social awkwardness, and has a truly absurd number of allergies--nevertheless Ronan knows he is the only one who can prove his parents were innocent and unjustly imprisoned. To do that, he must go to the land of the leprechauns.

"Frankie is different from everyone in her class, and she can't figure out why. She has trouble concentrating, and her classmates tease her for not having a dad at home. To try to make sense of the world, Frankie doodles her daily adventures in a journal. One day, when Frankie sneaks into her mom's room and sees her biological father's name on her birth certificate, she decides to go on a mission to track him down. Could Frankie's father be the key...

Finn O'Finnegan returns home after a year in Dublin and when he finds his village taken over by leprechauns, he must devise a way to get them to leave without making them angry.