 "Slow Air" followed in 2002, and his third book, "Swithering", was published in 2006, winning the Forward Prize for Best Collection.In 2004, Robertson received the E. M. Forster Award from The American Academy of Arts and Letters.In 2009 he was elected a Fellow of the Royal Society of Literature  He completed the set of Forward Prizes in 2009 when "At Roane Head" won the award for Best Single Poem.