Porter Square Books, 25 White Street in Cambridge, will host author Richard Horan on Monday, May 9, beginning at 7 pm, for a discussion of his latest book Seeds: One Man’s Serendipitous Journey to Find the Trees That Inspired Famous American Writers from Faulkner to Kerouac, Welty to Wharton.  From the wooded road made of golden hemlock running past L. Frank Baum’s childhood home to the lonely stump of Scout’s oak in Harper Lee’s Alabama, Richard Horan gathers tree seeds-and stories-from the homes of America’s most treasured authors. At once a heartfelt paean to literature and a wise, funny, and uplifting account of one man’s reconnection with nature, Seeds celebrates Horan’s triumphs and calamities on his quest to link trees with great writers.  Richard Horan recently spoke with Tom Ashbrook, the voice of “On Point”, about the book and his experiences on the road.  Horan is a novelist, English teacher, and book reviewer for several national publications. His novel Goose Music was a finalist for the Great Lakes Fiction Award and won the ForeWord Book of the Year Bronze Medal. He lives in Oswego, New York.  For more information, email ellen@portersquarebooks.com, or call 617-491-2220.