"How the hell can they expect to send men out to Mercury when they can't even control a simple situation down on Earth?"
Back in 2014 internet SF mastermind Joachim Boaz recommended to me (and to others!) Barry Malzberg's Universe Day, a paperback printed by Avon in 1971, the year of my birth, and published under Malzberg's transparent pseudonym K. M. O'Donnell. (Check out Joachim's review!) The cover of Universe Day is pretty good, and I feel a little guilty over the fact that I dropped mine one day and put a big gouge in it. (I'm afraid I'm not as good a custodian of these artifacts of SF history as I should be.)
Universe Day is a fix-up novel, and the indispensable isfdb lists (some?) of the stories which form the basis of the novel:
I had reason to suspect that this isfdb list is incomplete because the publication page of Universe Day under the heading "Some of this material has appeared in substantially different form in:" lists Nova 2--Nova 2 (1972) includes the Malzberg story "Two Odysseys into the Center"--and Galaxy, with the date 1971--in the March issue of that year Malzberg's "Gehenna" appeared.
Curious to compare the initial short story versions of these tales to what they look like incorporated into the novel, alongside Universe Day I read the short stories upon which it was based! Two of those listed at isfdb I have actually read and written about before; "Pacem Est" I read last year in my copy of In the Pocket and Other S-F Stories and "Elephants" I read in 2015 in my copy of Infinity Two. "Making Titan" and "A Triptych" and "How I Take Their Measure" I read at the internet archive, and "Conquest" in my copy of the 1973 paperback printing of New Dimensions 1. "Gehenna" I read back in 2013 in a library book, and also appears in In the Pocket and Other S-F Stories, and has no relationship to anything in Universe Day, so why Galaxy is listed in Universe Day I do not know, maybe there is a typo in there. You can "borrow" scans of Nova 1 and Nova 2 from the internet archive, a somewhat cumbersome process of accounts and passwords and waitlists, and I tried this but got sick of waiting and so ordered the volumes through Amazon so I could read "Two Odysseys into the Center" and "Terminus Est" while I was still middle-aged. To my surprise "Two Odysseys into the Center" has only the most tenuous thematic connection to Universe Day.
There is a lot more material here than in my usual blog posts which cover a single novel or three to five stories, so I am putting my findings "below the fold." If you have any interest in the results of this research project in Malzbergian studies, click to read on!