Thanks for this update. My price didn't update yet (should be $22.79 after this adjustment and 5% Quick Picks discount), so I sent an email to Amazon CS.
I was considering cancelling the book order if I wasn't able to get it for under $25, but it looks like that's happening now.
I never got a price adjustment. I contacted customer support. A very helpful representative. Kept my free shipping in the price adjustment. Hope you all get free shipping for the book alone! $23.99 for the book and no tax is great!
The price for the guide is back at $23.99 as of now. I saw it at higher prices earlier this week, so if anyone's interested and missed out on this price last time, here's your chance.