World Tree by David Wojahn By EVAN MCGARVEY • April 27, 2011 Related Program: WPSU's BookMark Tweet Share Google+ Email For the last week of National Poetry Month, we take a look at a book published by the University of Pittsburgh Press. Find out more about a poet that's working everything from Reagan to Scrabble into his exciting poems. Learn more about David Wojahn here. Read about the poet's writing process. Find out more about the University of Pittsburgh Press.