I became a fan of Oberg's way back with "Red Star Rising" (hope I remembered the right name there) and here he continues with historical analysis of lessons learned from Apollo-Soyuz, et. al. international space endeavours.

“I am convinced that all future flights will be international,” Leonov said at the NASM. Stafford agreed that international efforts are needed for the return to the Moon and making several expeditions to Mars. But why should merely saying so make it true?
...Having the Russians along was supposed to make the project cheaper, but it cost more to build the proper international interfaces. Launching all components into a northerly orbit accessible from Russia increased the space transportation cost by billions of dollars.

Nor did the Russian presence make the project faster, better, or safer, as it turned out. NASA was supposed to “learn from the immense body of Russian experience”, but it seems they never did—they just flew their missions and learned the necessary lessons directly. Repeated inquiries to NASA to specify things that had been learned exclusively from Russian experience have resulted in a pitiful short list of trivial “lessons”.