"Is there any books...?"

Grammar aside, yes. Some are even referenced here: https://www.google.com/search?q=website+commerce+security&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official Doubtless Amazon, B&N or your local bookstore could suggest more. Then you could browse some, pick a few that you seem to suit your needs, and ask a far more useful and reasonable question, such as

"Are there are of these the Monks especially recommend (OR recommend against?

Is there any reason you didn't take self-help(-first) route?

As to securing scripts... depends on a host of other details you didn't tell us: who's running the server, how well hardened is it, and at what level of security is your security "good enough" for your risk level and tolerance?

PS: Fraud protection is also an important element for an e-Commerce site. Who's handling the money? Checking creditcard validity?