The Imagination Station #10 Challenge on the Hill of Fire by Marianne Hering and Nancy I. Sanders illustrated by David Hohn*

Patrick and his cousin Beth travel back to Ireland and the Druids.
They meet King Logaire and Bishop Patrick.
My second grader brought home this book from his school library and read it to himself.  He thought it was exciting and liked the part when Patrick (the cousin) was able to meet the king.

A Leprechaun's St. Patrick's Day by Sarah Kirwan Blazek illustrated by James Rice

In rhyming text, the reader learns about typical St. Patrick's Day activities in Ireland.  Of course, the tricky leprechauns abound!
Real Irish words are included (along with their definition).  The author was born in Ireland and retains dual citizenship (Ireland and U.S.)

A Fine St. Patrick's Day by Susan Wojciechowski illustrated by Tom Curry

Two towns, Tralah and Tralee, compete each St. Patrick's Day in a decorating contest.  Tralah always wins.  The story relates how a small gentleman comes on the eve of St. Patrick's Day for the villages' help in rescuing his cows stuck in the mud.  Both towns are frantically completing their decorating tasks.  Only the people from Tralee help the man and go to bed not completing their decorating.  They awaken the next morning to a huge surprise and learn a lifelong lesson.
Strategies: predicting, inferring

Clever Tom and the Leprechaun by Linda Shute

I loved the illustrations-facial expressions especially.
Tom happens upon a leprechaun and thinks that he will be set for life with the leprechaun's riches.  The leprechaun has the last laugh, of course!!
Funny!
The author shares the history of the story, leprechauns,  and of Ireland in the back.