Join other enthusiasts in great conversation while immersed in the beauty of the Garden at Elm Bank. The Massachusetts Horticultural Society Book Club meets monthly at 1:30 in the Putnam Building, 900 Washington Street. On April 18, the book to be discussed is A Clearing in the Distance: Frederick Law Olmsted and America in the 19th Century, by Witold Rybcznskji. To join the list, visit www.masshort.org.