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.
Shakespeare's sonnets
The title of the quarto, "Shakespeare’s Sonnets", is consistent with the entry in the Stationer Register. The title appears in upper case lettering on the title page, where it is followed by the phrase “Neuer before Imprinted”. The title also appears every time the quarto is opened. That the author’s name in a possessive form is part of the title sets it apart from all other sonnet collections of the time, except for one — Sir Philip Sidney’s posthumous 1591 publication that is titled, "Syr. P.S. his Astrophel and Stella", which is considered one of Shakespeare’s most important models. Sidney’s title may have inspired Shakespeare, particularly if the “W.H.” of Shakespeare’s dedication is Sidney’s nephew and heir, William Herbert. The idea that the persona referred to as the speaker of the Shakespeare’s sonnets might be Shakespeare himself, is aggressively repudiated by scholars, however, the title of the quarto does seem to encourage that kind of speculation.