Sorcery is definitely better, seeing as Riven doesn't really want attack speed as much as she does CDR, and Fury gives insignificant amounts of attack speed anyway.

tbh the Fury or Sorcery thing is preference. CDR is simply delicious on her but I agree that her early attack speed is meh. Taking Fury for early last hits is not that bad so I didn't make a paragraph about it. lol sorry for me not being clear in that.

One big, glaring thing I see is 2 Boots starts. Boots are really bad level 1 in TT for the same reason they're bad on Summoner's Rift. They provide no damage, no defense, no sustain. Just mobility, which Riven has no problem with at all. When I play her, I normally run a Doran's Blade, a Cloth Armor, and 2 Health Potions. The Cloth instead of boots give you a nice bit of bulk so you can be far more aggressive without as much fear of counter harass. Later it can be build into a Warden's Mail or something if need be.

The only other thing I saw was Wicked Hatchet. Riven is an AD caster. Her autos hurt but she relies far more on her abilities for damage output, so crit isn't that amazing. Yommou's Ghostblade is about the only crit item that is decent on her and that's for literally everything else on the item except the crit chance.

Other than these things (and taking Fury over Sorcery) the guide looks nice. May put in some extra sections like matchups or something but overall not bad. :) glhf

Solid start but I think you should get rid of Ghost and select/ recommend Ignite instead. In your notes about "Early Game" item for the Standard Build you wrote it's instead of its, just noticed it :P