Great idea. As for myself;
Shakespeare is obvious. Not because I've read any plays - I prefer to see them - but it's nice to be able to look up quotations.
The bible - ditto.
At least one novel by E. M. Forster.
Lord of the Rings. I only own three different paper editions myself
Grimms' Fairytales
Arabian Nights
The odessey
Saxo Grammaticus: Gesta Danorum and the Icelandic sagas and perhaps stories from the eddas. These ones probably make most sense in a Scandinavian bookcase
