Reddit reviews Symphony No. 5 in C Minor (Norton Critical Scores)

Norton editions of the scores usually have lots of wonderful things in them

http://www.amazon.com/Symphony-Minor-Norton-Critical-Scores/dp/0393098931

Although the wikipedia article has some interesting points

As /u/65TwinReverbRI says, analysts generally don't focus too much on what individual composers do. That's more of the realm of musicologists/music historians. In general, I'm not sure that much biographical writing is immediately useful for composers and performers. On the one hand, knowing that Beethoven was a slob — had plates of unfinished meals strewn everywhere throughout his home, unemptied chamber pots throughout his room and under his piano (according to the Baron de Trémont's account) — can reassure you that nobody's perfect and that art often comes at a cost to its creator. On the other hand, these are interesting quirks, not models. Pooping in a pot and leaving it under your furniture is not going to magically improve your musicianship.

Performing and composing musicians are often more interested in the nuts and bolts, how you put things together in a musically expressive manner. To this end, theory provides commentaries on specific works, yes, but is typically concerned with general principles. A book like William Caplin's Classical Form: A Theory of Formal Functions for the Instrumental Music of Haydn, Mozart, and Beethoven, may be based off of a chunk of repertoire specific to three composers, but its usefulness is in the methodology. The same conclusions could have been gleaned from looking at any of Haydn, Mozart and Beethoven's contemporaries. If you're really interested in specific analyses, you can look at the Norton Critical Scores for various pieces, and you can probably find a few books.