Shakespeare's Sonnets Are Poems Written By William Shakespeare On A Variety Of Themes. When Discussing Or Referring To Shakespeare's Sonnets, It Is Almost Always A Reference To The 154 Sonnets That Were First Published All Together In A Quarto In 1609. However, There Are Six Additional Sonnets That Shakespeare Wrote And Included In The Plays Romeo And Juliet, Henry V And Love's Labour's Lost. There Is Also A Partial Sonnet Found In The Play Edward Iii.