An Introduction to Multivariable Mathematics (Synthesis Lectures on Mathemat...

An Introduction to Ordinary Differential Equations (Dover Books on Mathe - GOOD

An Introduction to Multivariable Mathematics (Synthesis Lectures on Mathematics

An Introduction to Multivariable Mathem..., Simon, Leon

An Introduction to Information Theory (Dover Books on Mathematics) - VERY GOOD

An Introduction to Multivariable Mathematics by Simon, Leon

Journey into Mathematics: An Introduction to Proofs (Dover Books on Mathe - GOOD

An Introduction to Mathematical Logic (Dover Books on Mathematics) - VERY GOOD