Dreams of Space is an excellent blog that focuses on a single subject: nonfiction kids books about space flight between the years 1945 and 1975. The publisher, John Sisson, recently posted scans from a 1961 Russian children's book called As We Were Flying on a Rocket. The photos are wonderful.
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Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects