I came across this wonderful website last night called Display, which describes itself as the following:
Display is a curated collection of 122 (and growing) important modern, mid 20th century graphic design books, periodicals and ephemera. For educational purposes, independent research and pure inspiration.
There’s so much amazingly inspirational work here from my favorite era in graphic design. Books, identities, collateral and lots more to pour over. Plus, there’s a bookstore to purchase rare and original versions.
Visit Display here and just try not to be influenced.