Hi Stefan,
I second Leon's idea of making up your own books.
You can buy simple home binding gear for as little as $70 or so at Officeworks. I bought one of these and it does fine for A4 and A5 books. Take the claims of punching 8 pages at a time with a pinch of salt (4 is more comfortable), but it does an OK job. I've done heaps of booklets with mine.
https://www.officeworks.com.au/shop/...ta8c#!features
The truth is that in today's world we're deluged with photos of every description - everybody with a phone has pictures to share. the challenge isn't so much taking pictures, it's finding somebody to view them! A Facebook page for your astropics is always an option, but your own little books would make good presents, as well as being handy logs for your own future reference. Add a bit of information about the gear, date, and settings you used for each photo (although maybe not too much in the gift versions!..) and some chat about the target in the images, and I reckon you'd find that even non star-freaks might enjoy them.
Cheers,
Chris