DENVER -- Good parenting doesn't guarantee good children -- at least that is according to a new book with exclusive interviews from the parents of Dylan Klebold, one of the two students responsible for the Columbine massacre.

The authors of "Parents Under Siege" spoke exclusively with Tom and Sue Klebold, and used some of that information to write a book about why children become troubled and violent despite being in loving, supportive families.

Authors James Garbarino and Claire Bedard say that the Klebolds are hidden victims and that it's quite common for kids to have secret lives.

"It's not because parents are blind or stupid, but because people are good at keeping secrets, and it's hard to walk around thinking the worst of ones you love," Garbarino told the Denver Post.

The Klebold family apparently contacted the two Cornell University researchers after reading one of their earlier books.

One section of the new book revolves around a survey conducted by the authors.

They polled 275 Cornell freshmen and asked them a number of questions including "What was the worst thing you did in high school?" Eighteen percent said they'd stolen from parents, 23 percent had driven drunk, 11 percent used hard drugs, and one-fourth considered suicide.

When asked if it was possible for a teenager to plan an attack such as Columbine without their parents knowing about it, 99 percent of the students said yes.

The authors in the book defended the Klebolds, whose 17-year-old son Dylan joined Eric Harris in an April 1999 rampage at Columbine High School, the country's deadliest school shooting.

"People naively assume there's a one-to-one correspondence with what you do as a parent and what you get with your child, so when your child gets in deep trouble, people assume you can work back from there to say parents are the cause of that," Garbarino told the paper. "This book is designed to lay out why that isn't necessarily so."

Some people questioned whether the Klebolds and Harrises saw anything about the teenagers that could have prevented the shootings.

Brian Rohbrough, whose son was gunned down outside the school, has said he isn't satisfied with the response of the gunmen's families.

"These are the people who have not said one word to my family, and they raised the murderers," he said last spring.

The Klebolds and Harrises were sued by some Columbine victims. The families have settled claims with 30 of the plaintiffs, but six families of slain students are pressing their civil lawsuits.

Garbarino acknowledged there is strong sentiment for holding parents responsible for the criminal acts of their children, but said that he hopes the new book will help people understand how kids can go bad even in good families.

More Information:

• Author James Garbarino's Cornell biography
• DISCUSSION: Who Do You Blame When A Child Is Violent?
• School Shootings: A Special Interactive Presentation