Signals: Continuous and Discrete is a practical, student-friendly textbook for introductory courses in signal processing. This textbook covers the material in a straightforward, easily digestible manner by focusing on the most critical information and developing an intuitive understanding of the underlying mathematics. Topics covered in the text include the Fourier series, the Fourier transform, systems and signals, pole-zero theory, convolution, sampling, and digital signal processing. Successfully classroom tested, Signals: Continuous and Discrete is a clear, concise textbook for upper division students and an excellent reference for graduate students or professionals in industry. Iyad Obeid is a professor of electrical and computer engineering at Temple University. Dr. Obeid holds a Ph.D. in biomedical engineering from Duke University. His research focuses on neural interfaces and biomedical signal acquisition and processing. He is the author of numerous professional publications and is a member of the IEEE.