I haven't seen a theme just like this one before, with the first word of multiple theme answers being taken together as a separate quote, and then the author being the last theme answer. I like it.
The blatant (10A: Number in a quartet (FOUR)), the more interesting (53A: French words describing how roast beef is often served (AUJUS)), and the uninferrable (47A: Volleyball star Gabrielle (REECE)) seem to be well-balanced today, and maybe it even skews a little to the "tricky" side. One is not always (or even often) treated to such interesting words as CUPOLA (48D: Domelike top) and OXBOW (50D: U-shaped bend in a river) on a Monday. CREPEPAPER (3D: Party streamer material) is another uncommon entry.
I prefer the "briar" spelling of BRIER (61A: Bramble), but it's nice to learn that the "e" version is out there, and even given as the primary spelling in the first online source I found. And, although I'll never remember it, it's also interesting to learn that GENOA is the 40A: Italian birthplace of Paganini.
Overall, a very nice Monday.