The graphic designer in me loves this particular 1965 book cover:
And here's a cutie – "Rut and Jan - easy reading for children" (1960):
I think I need to translate this next page for some of you, as I find it very sweet and not just a little ironic :-)
"Jan has a friend.
He's called Finn.
Every day Finn goes over to Jan's.
He then asks:
Will you come out, Jan?
Then Finn and Jan goes out."