'Manjushree Th apa's Seasons of Flight is many things-a love story, an immigrant's tale, a matter-of-fact telling of the costs of war, a manifesto for environmental conservation, a meditation on faith and chance. A [novel] could sag under the burden of such weighty themes, but Th apa pulls them together fl awlessly.'-India Today Prema, a young woman adrift in war-torn Nepal, with little to bind her to her family, village and country, wins a green card in a US government lottery and emigrates to