Amazon.com just posted my five star review of Beginning C by Ivor Horton. Apress provided a free review copy. From the review:
I read Ivor Horton's Beginning C to gain some familiarity with the C programming language. As a security professional, being able to grasp the essence of C helps me understand security advisories and related discussion of vulnerabilities in exploits. Beginning C is a great book for a person like me, but it also appears to be the right book for someone who wants to become a legitimate C programmer. I highly recommend it to both sorts of readers.