An utterly fascinating (if slightly dated) book, which lays out good rules for how to wrestle sometimes uncomplete, and therefore complicated, Shakespeare texts into a form where they can be read by a modern reader.
The Shakespeare texts that come to us are so often cleaned up versions, with stage directions added (for "clarity") which sometimes end up obscuring ideas in the text. I do not agree with Wells' decisions in chapter 4 (I prefer my Titus Andronicus unsoiled by too many additional Stage Directions) but he explains clearly the choices he made, and why.