I dunno about Steans book, but I have 2 books by Euwe and don't recommend them for your rating. I guess that makes Stean the winner from your library.
I'd highly recommend Irving Chernev's "Logical Chess Move by Move" and "The Most Instructive Games of Chess Ever Played" used, PB, from amazon.
Im 1300-1400, should I read these ( Euwe's both "The Middlegame" ) or Simple Chess by Michael Stean???
which one should i start with????