Son got me a copy years ago for my birthday.
If you like the SR71, the photos won't disappoint.
Son searched for three years before finding a "good" copy for under$150. ABE Books is where he found it.
Do AutoCAD drawings. Have a SR71 Habu model that I have been working on since 2002, over 3000+ hours of trying different things.
Member of Papermodelers.com. I have a free down load of it you can download print at home, construct using white glue.
It is 28" long, rendition of the SR71 Blackbird, Lockheed has the Trademarks/copyright for the name SR81 Blackbird, but not HABU. Model is designed to fly, CG location marked on fuselage. Here is a link to the download page.
https://www.papermodelers.com/forum/vbdownloads.php?do=main&perpage=20&categoryid=21&page=19
The model is at the very bottom, the instructions are the second download you will need. Must be a member to download. Probably three days of cutting/gluing. No jigs required. Takes me 10-hours to construct, lots of prior practice. 12- pages of parts that drink plenty of ink.
Here is what a 48" long Paper Card Stock SR71 HABU looks like:
Why the roll? Forgot to glue the right rudder on, it was dry fit. Within 0.5 seconds of this photo, it came off. Inverted crash. Model survived and flew more photo missions.
Mike