Re:Alien life could be so advanced it becomes indistinguisha...
by pavel_lishin on Tuesday November 22, 2016 @07:26PM
(#13018919)
The Xeelee Sequence of books addresses similar ideas, except I'd argue that the Xeelee and the Photino Birds are several orders of magnitude above the Heechee and The Foe.
They don't show up until like book 3 of the series though.