"Biotherm" is the last long poem of Frank O'Hara, whose accidental death in 1966 at age forty deprived America of one of its most vital and innovative poets. The poet and critic Bill Berkson, to whom the poem is addressed, provided an essay and compiled a glossary to explicate the references in the poem and to recount the circumstances of its writing. The artist Jim Dine knew O'Hara and admired his work. Challenged by O'Hara's brilliant experimentation in "Biotherm", Dine's prints pay a vibrant homage to the poet and engage themes in the poem. Biotherm, a true livre d'artiste, is the sixth collaboration between Jim Dine and Andrew Hoyem.