A former police officer befriended perverts for 20 years as an undercover paedophile.
Ian James still battles the horrors of what he saw and read when delving each day into the dark world of child sex abuse.
The officer's job was to save kids from harm and help catch predators with enough evidence to see them locked up.
Ian's harrowing daily encounters which required overseas travel and gaining the trust of monsters, ran alongside trying to raise children of his own.
The book, 'Save One Child' spells out the grisly nature of Ian's job which he has since spoken about on the podcast series Anything Goes With James English.
According to LadBible, Ian said of paedophiles: "They're very cautious, they're very suspicious, they're very suspicious because they don't necessarily think you're a police officer, they're more likely to think you're a journalist and they're going to be named and shamed.
"Sometimes what you've got to do is manipulate them to be accepted, and it's so difficult because you'll only have a small window of opportunity to do it.
"Then, if you don't, if you're not successful, then theoretically, you're finished. Because you can't go back in your domain."
Unbelievably Ian went inside prison as an undercover lag to get more evidence from an already incarcerated offender, risking his own safety as a police officer a paedophile "sympathiser".
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He said: "You can imagine the sort of complexities, I'm going into a prison.
"The problem there is, they don't like predators, and I'm supposed to be a sympathiser, or I could be one.
"And, I'm actually meeting someone who is convicted, so you can imagine the potential hostility."
Over the years, James was responsible for saving at least 50 children, and that desire to help the kids kept him heading back into these situations to catch those responsible.
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"You save one child, and you think 'do you know what? I can do this because I've just done it.'
"The satisfaction that I had became a bit of an obsession because if you save one child, then you want to save another one, then another one.
"Dare I say it – we were probably far more successful in saving children than we were at getting convictions."
If you or somebody you know has been affected by this story, contact Victim Support for free, confidential advice on 08 08 16 89 111 or visit their website, www.victimsupport.org.uk.
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