Just noting that Quality Chess' promised book on the King's Gambit is as elusive as ever. Now the publishing date is set to May (the discrepancy between the publishing schedule and the book's info page is normal).
Now the blog says May/June while the book's info page says May. In one month the publishing date has only been delayed with half a month - looks like progress.
And now it's July. Not quite two months have passed and the delay is another month and a half... No new indications of progress.