who wrote it?
William Shakespeare
Sonnet 15
poet William Shakespeare.
shall i compare thee to a summer's day thou art more lovely and more temperate meaning UNANSWERABLE what is this sonnet? Sonnet 18 is a typical English or Shakespearean sonnet, having 14 lines of iambic pentameter: three quatrains followed by a couplet.  The poem reflects the rhetorical tradition of an Italian or Petrarchan Sonnet.
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Sonnet 15 [SEP] Introduction
Sonnet 15 is one of 154 sonnets written by the English playwright and poet William Shakespeare. It forms a diptych with Sonnet 16, as Sonnet 16 starts with "But...", and is thus fully part of the procreation sonnets, even though it does not contain an encouragement to procreate. The sonnet is within the Fair Youth sequence.