Finally, something I know a "little" about. *sigh*
Dieter K. Huzel and David H. Huang wrote "Design of Liquid Propellant Rocket Engines" in the early 70's. It was written as a complete text, but Nasa published it in 11 smaller parts.
So, technically your correct that the seller has split them up - to their original form - however that also means you'd have to buy all 11 parts to get the complete text. Which personally I find to be a bit rediculous.
So, what to do ?
I have found an Ebay seller whom has the exact same book - complete on CD, but the catch is he's in brazil and only takes Paypal.
https://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3596798808&category=11437
He has another CD up for bid as well, all on engine design.
https://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=11437&item=3597323072
As you look at these two auctions, note that the 1st CD has the Design of Liquid Propellant Rocket Engines as 392 pages and the 2nd at 460.
I'd dearly love to have a copy of these books, so my thinking is, if someone who is interested in the books would order these 2 cds from him, I'd be more than willing to pay for a burned copy + S&H.
Hopefully the staff here at TRF won't look down on this as a bad thing - if so, please remove this thread and accept my apologies for making this a public proposal.