Muchamore also wrote a seven-part series called Henderson's Boys, which takes place during World War II and explains how CHERUB was founded, following the path of a 12-year-old French orphan named Marc Kilgour who meets Charles Henderson and shows him how much help children can be to win the war.

[4] The first series primarily follows James Adams, a 12-year-old boy who is later joined at CHERUB by his sister Lauren after their mother dies from drinking alcohol while on antibiotics.

A couple of months later, James goes on a mission to Wales with fellow agent Amy Collins to thwart an attack on an oil conference by eco-terrorist group Help Earth.

James, Kyle, Kerry, Nicole, and mission controllers Zara and Ewart Asker help to take down the cocaine supplier gang KMG.

James' duty is to befriend the head of KMG's son (a well used Cherub tactic), Junior Moore, to attempt to get valuable information on his father's illegal activities.

Things take an unexpected turn and a trip to Keith's holiday home in Miami is in order where members of a South American cartel attack the house .

James and Dave go undercover inside a maximum security prison in Arizona to break out Curtis Oxford, the son of an illegal arms dealer.

[7] James and Dave go to find out why a small-time crook called Leon Tarasov suddenly appears to become extremely rich, and they uncover a plot much larger than a robbery: the murder of Will Clarke.

[8] James, Lauren and Dana investigate a religious cult named The Survivors in Australia with suspected links to the eco-terrorist organisation Help Earth.

Lauren is recruited for a mission to befriend Anna Chaika, a young girl who is suspected of having been smuggled into the UK by sex traffickers.

In the aftermath, it is revealed that Ewart had concealed his knowledge of the circumstances of Obidin's death to protect James from potential interrogation by MI5 and to prevent the Hiltons from discovering the extent of CHERUB's investigation.

[13] James' sister Lauren and Jake Parker go undercover to befriend a boy who claims that his father is responsible for a deadly plane crash in the Atlantic.

[14] After an uncomfortable break-up, James, Lauren, and other CHERUB agents join the SAS and play insurgents in a US army training exercise in Fort Reagen.

However the odds are stacked against them and only a master plan from CHERUB instructor Yosyp Kazakov can win the war for the Brits.

Ryan investigates (and befriends) a young boy called Ethan whose extended family are the leaders of a Kyrgyzstan-based terrorist group known as the Aramov Clan.

[18] Ryan is tasked with destroying the Aramov Clan after Ethan is kidnapped by his uncle who seeks to take over the business.

[19] Ryan has to stop the biggest terrorist attack in U.S. history as Aramov operations wind down, and James Adams returns to CHERUB campus.

Released for World Book Day, Rat and Andy go undercover to befriend a boy whose father is a member of Dark Sun, a criminal organisation dealing in nuclear weapons technology.

It was formed during World War II by Charles Henderson; a British spy who had used children during an operation in France.