Reddit reviews Into That Silent Sea: Trailblazers of the Space Era, 1961-1965 (Outward Odyssey: A People's History of Spaceflight)

Red Moon Rising by Brzezinski is an engaging, novel-like quick read that dramatizes and summarizes the early space race. Side-by-side history of early US and Soviet space rocketry. Great stuff on the inheritance of the V-2 tech after WWII.
https://www.amazon.com/Red-Moon-Rising-Sputnik-Rivalries/dp/080508858X

Korolev by James Harford is about the man without whom the space race wouldn’t have happened. A bit dry (academic) at times, but a well researched book with lots of cool details from first-hand interviews. Korolev was a fascinating guy. An under-appreciated giant of the 20th century.
https://www.amazon.com/Korolev-Masterminded-Soviet-Drive-America/dp/0471327212

Starman by Pierce and Bizony on the meteoric rise and end of Yuri Gagarin. Very engaging. Read for the story of Komarov!
https://www.amazon.com/Starman-Truth-Behind-Legend-Gagarin-ebook/dp/B0052LUE80

Into That Silent Sea/In the Shadow of the Moon by French and Burgess. Another side-by-side. Great history from pre-Sputnik to Apollo, the moon, beyond. Lots of good stuff about individuals on both sides.
https://www.amazon.com/Into-That-Silent-Sea-Trailblazers/dp/080322639X/

Russian Wikipedia. Seriously, run it through Google’s page translate feature, keep a tab open for google translate so you can copy-paste search terms in Russian. Lots of extra info on RU Wikipedia vs EN Wikipedia.

Kamanin’s Diaries. Kamanin was a Red Army General that got assigned as personnel handler for the Cosmonauts. His diaries of the early days are probably the best primary source for and industry forged in a time of uber-secrecy. I haven’t found a full English translation.

English Summaries:
http://www.astronautix.com/k/kamanindiaries.html

Russian Language:
http://militera.lib.ru/db/kamanin_np/index.html