Shakespeare's sonnets
The primary source of Shakespeare’s sonnets is a quarto published in 1609 titled "Shakespeare’s Sonnets." It contains 154 sonnets, which are followed by the long poem "A Lover's Complaint". Thirteen copies of the quarto have survived in fairly good shape from the 1609 edition, which is the only edition; there were no other printings. There is evidence in a note on the title page of one of the extant copies that the great Elizabethan actor Edward Alleyn bought a copy in June 1609 for one shilling.
Petrarch's and Shakespeare's sonnets
William Shakespeare utilized the sonnet in love poetry of his own, employing the sonnet structure conventionalized by English poets Wyatt and Surrey. This structure, known as the English or Shakespearean sonnet, consists of three quatrains and a concluding couplet. The rhyme scheme is a simple ABAB CDCD EFEF GG format. The effect is “like going for a short drive with a very fast driver: the first lines, even the first quatrain, are in low gear; then the second and third accelerate sharply, and ideas and metaphors flash past; and then there is a sudden throttling-back, and one glides to a stop in the couplet”. Like Petrarch, Shakespeare used structure to explore the multiple facets of a theme in a short piece.