This set of advertisements to promote reading was offered to booksellers by the Bund Reichsdeutscher Buchhändler. They're taken from Börsenblatt für den deutschen Buchhandel, February 1936, and I wish I'd taken better photos.
"Your books are your best friends"
"Benefit from the experience of others, read technical literature!"
"Masters: let your apprentices read books!"
"Books help you through life"
"Use your free time, read a book"
Here's that last one as part of a display:
And because no part of 1930s Germany was all sweetness and light, one poster is a quote from Hitler about how he benefitted from extensive reading: " Still, nice tablecloth they've got in that window huh?