Some time ago, I found a rather nice set of Orion paperbacks of the John Gardner Bonds, all in uniform covers, with subtly differing designs and colourways (see here on the rather excellent Piz Gloria reference site). Well, that's to say I found someone selling 14 out of the 16 in the set. Obviously, I snapped them up (ignoring the fact that I'd previously purchased the box set containing five of them), thinking I'd add the other two at a later date. Actually, the Orion books that I was buying were still available new from Amazon, but I was very happy to do so given that I was paying £3 per book (and they were 'as new') and the Amazon price as £9 per book.
However, the missing two were the first two of the Gardner books (Licence Renewed and For Special Services). Since the uniform set were published in 2012, the good people at Orion had decided to reissue these two with new artwork - just these two (see again here on Piz Gloria). This makes it substantially harder to find the first two books in the 2012 cover versions.
I have finally, hooray, found Licence Renewed.
The search goes on for For Special Services ...