Translation of umstürzen

Thanks for the message. I hope that your friend here in England will soon be feeling better. If you decide to come at another time, I would be very pleased to meet you here. You can sleep at my place.
The fact that I have received many emails from students in order to make Vocabulix known is a personal success for me. But I think that a new website with many pages would be better for future uses.
I'm also not interested in such things, but I had a classmate who recommended the book 'Mice and Men' and that's why I bought it. It is a very interesting book and tells about old times in the U.S.