I know the book is a bit pricey ($40), but it is well worth the investment for anyone who teaches Shakespeare. Besides a good biography of the Bard, I think Tanner's "Prefaces" is essential to deepening one's understanding and teaching of Shakespeare's works. Unless you are a college professor, most readers won't read "Prefaces" from cover to cover (I didn't); but for that core of plays we all encounter in our high school and college years (About 10 or so, right?), the money will be well spent. I mean, if I could give a Sixth Star to this review, I would.
Tanner's prefaces are not pedantic, but enlightening, enriching. He never says "This is what this passage MEANS"; he says "This is what OTHERS have said it could possibly mean; this is what I think it means", allowing the reader room to reach his/her own conclusions about the text. As mentioned in the Foreword, Tanner didn't think of himself as a critic, but rather as an "appreciator", of literature, and that love of the written word comes across in his essays. He made me think of plays and characters and the inter-relatedness of the works in ways I hadn't thought about, but I never felt "talked down to." Rather, reading the prefaces (about 7 of them, so far) and the genre intros (Comedies/ Tragedies/ Histories/ Greek and Roman Plays) made me feel like I was in the company of a mentor who was allowing me into the conversation of great minds as they wrestle with ascribing meaning to Shakespeare's words.