Weil - Basic Number Theory - New paperback or softback - X555z

Petersen - Ergodic Theory - New paperback or softback - X555z

Arnol'd - Singularity Theory - New paperback or softback - X555z

Smith - Contract Theory - New paperback or softback - X555z

Preston - Development Theory - New paperback or softback - X555z

Hughes - Design Theory - New paperback or softback - X555z

Endler - Valuation Theory - New paperback or softback - X555z

Blackadar - K-Theory for Operator Algebras - New paperback or softback - X555z