Out of print and Unattainable

Out of print adjective - (of books) no longer offered for sale by a publisher.

Unattainable and out of print are semantically related. in no longer in print topic. In some cases you can use "Unattainable" instead an adjective phrase "Out of print".

Unattainable adjective - Hard or impossible to get to or get at.

Out of print and unattainable are semantically related. Sometimes you can replace phrase "Out of print" with "Unattainable", this terms are similar.