Free 404 practice questions for cancelled appointments

Thanks for posting the news. That's great!!!
(I have slightly updated your post to put more focus on the free 400 practice questions from the GMAC; though I realize most of my post is now about the Official guide )

As to the OG 2021, it's been announced a while ago and was expected in Mid-April but now Amazon has moved/shifted it to May 12th in the US (yesterday that date was May 15th, so it seems to be fluid). OG 2021 US Amazon site link.

However the price is still $47 right now with no discount (usually they will discount it down as soon as the book is actually out). Amazon will refund you money if you pre-ordered but what they do often is they prioritize new orders first and as a pre-order, my order often arrives quite a few days later than for people who have ordered it on the day of the release (and I am in Seattle of all the places).

Another secret about the OG is that you can usually get it sooner from the EfficientLearning site in e-Book format. Last year it was available April 25th (a week or two sooner than from Amazon May 7th date): https://gmatclub.com/forum/official-gui ... 94189.html)