Reading scripture takes priority over reading other books. God's Word gives us direction, correction and protection (Psalm 1; 119:105; Proverbs 1:1-5; 2Timothy 3:16).
Our physical bodies cannot survive without food and liquid, neither can our spirits survive without God's a Word and obedience to his voice.
Paul told Timothy to devote himself to reading scripture (1 Timothy 4:13). Can we do any less?