A Friendly Introduction to Mathematical Logic (Paperback or Softback)

Forall X: An Introduction to Formal Logic (Paperback or Softback)

A Concise Introduction to Logic (Paperback or Softback)

Introduction to Logic (Paperback or Softback)

An Introduction to Non-Classical Logic by Priest, Graham Paperback / softback

An Introduction to Mathematical Logic (Paperback or Softback)

Introduction to Logic Paperback Paul Herrick

An Introduction to Formal Logic: Second Edition (Paperback or Softback)