For his final madrigal book published in his lifetime, the eleventh, he set passages from Guarini's "Il pastor fido", one of the most popular texts for musical setting of the era. The final collection published under Wert's name came out posthumously in 1608, and contained pieces for four to seven voices. One of its madrigals was a setting of Guarini's notorious "Tirsi morir volea", an obscene poem that Einstein called "worthless, indeed contemptible", and "...more obscene than the coarsest "mascherata", the most suggestive "canto carnascialesco", or the most impertinent chanson ... could not be more removed from true poetry" but yet which was the most-often set individual poem of the late sixteenth century. It portrayed a nymph and a shepherd attempting, by speeding up and slowing down, to achieve simultaneous orgasm, with multiple "double entendres" on "death" and "dying"; the popularity of this poem was enormous. Wert wrote his setting in 1581.