Logic forms the basis of mathematics and is a fundamental part of any mathematics course. This book provides students with a clear and accessible introduction to this important subject, using the concept of model as the main focus and covering a wide area of logic. The chapters of the book cover propositional calculus, boolean algebras, predicate calculus and completeness theorems with answers to all of the exercises and the end of the volume. This is an ideal introduction to mathematics and logic for the advanced undergraduate student.