If you would like to go with used books, some online options:
Search for "Macbeth Folger" or "Macbeth Collins Classics," and pay attention to shipping (it might not make it worth it OR it might take a long time, especially if the seller is outside the US)
Thoughts/Sentences/Independent Clauses=what the character is saying
Lines/Meter/Syllables= CONTEXT (emotional state of the character, movement on the stage, and so forth relates to this)
Don't attempt to read a speech line by line and make sense of it--read it independent thought by independent thought, and then use the lines/meter to help reveal emotional state, characterization, movement, and other details.
(More info in the Ben Crystal handout, also posted above.)