There's no real mystery. Shakespeare was a well-regarded poet, actor, and playwright in a time in English history where these were not yet particularly prestigious things to be. Marlowe died a quarter-century before Shakespeare and we have virtually no documentary evidence from his lifetime, and yet nobody is making websites to prove that _Tamburlaine_ was really written by Ben Jonson.
The book Contested Will by James Shapiro is a really interesting historical review of why Shakespeare authorship theories are such a persistent and recurring thing, despite the lack of new evidence. He also covers how they got started in the first place and why it's Shakespeare in particular that gets this treatment. Highly recommended.
The book Contested Will by James Shapiro is a really interesting historical review of why Shakespeare authorship theories are such a persistent and recurring thing, despite the lack of new evidence. He also covers how they got started in the first place and why it's Shakespeare in particular that gets this treatment. Highly recommended.