Thanks everybody!
Yes, perhaps I'm a little paranoid about privacy - yet I come from a remote past when even opening a letter addressed to someone else was considered a criminal action, thus cannot help feeling uncomfortable with Google reading my E-mails, the police monitoring my IP address, eBay keeping track of my purchases, and so on.
Because of that I think I'll keep the WiFi carefully shut down in spite of your kind reassuring words. I've downloaded and installed a nice, free, open-source
calibre that seems to be able to replace Amazon's website in almost all positive respects (creating collections, tiding up books, uploading texts etc.), but all within one's computer, net cable unplugged
As far as lightning-fast book purchasing is concerned: it takes me at least a week to read and appreciate a good book without cutting corners, thus getting it in a matter of seconds or of quarters-of-an-hour doesn't really make a difference
About that beer, it's yours. When you plan to be near Munich just give me a ring