Cosmonaut Keep is a science fiction novel by Scottish writer Ken MacLeod, published in 2000.

[2][3] Publishers Weekly had mostly praise for the novel saying: MacLeod handles the strands of the plot deftly, weaving one beautifully realized world with the other and highlighting the parallels between the two.

Densely written with a remarkable depth of cultural texture, though occasionally confusing in its politics (which includes socialists, "Webblies" and libertarian capitalists), MacLeod's story is spoiled only by the false notes of two parallel love interests.

[4]In Cosmonaut Keep, MacLeod makes fleeting reference to a future programmers' union called the "Information Workers of the World Wide Web", or the Webblies, a reference to the Industrial Workers of the World, who are nicknamed the Wobblies.

The idea of the Webblies formed a central part of a later novel For the Win by Cory Doctorow, where it is given much greater prominence.