When Malaysia's sixth prime minister Najib Razak was sentenced to twelve years in prison and fined RM 210 million for stealing billions from the 1MDB state investment fund he had himself set up, it exposed a chain of events that began decades ago, and which continues to reverberate economically, financially and politically, bleeding the treasury and inflicting immeasurable pain on taxpayers for generations to come.

Malaysian journalist Leslie Lopez's first book, The Siege Within, delves into the writer's own archives of previously unpublished material to go back in time and show exactly how it was possible for a Malaysian prime minister to envisage his treacherous crime, and then to execute the dastardly deed. From its most 'innocent' beginning in a north Malaysian state, Lopez charts how Najib and his warlords set up the investment fund for the sole purpose of stealing from it.

Lopez's literary debut goes on to show how 1MDB is not just about Najib. The book brings into sharp relief the Machiavellian schemes of a prime minister who sat at the top for more than two decades, and came back from retirement to become PM again in 2022, at the age of ninety-two. The Siege Within paints Mahathir Mohamed as the chief architect of a political system that paved the way for a criminal such as Najib to lie, cheat and steal his way to power, a system which then protected him from scrutiny and prosecution.

One-time central bank governor Zeti Aziz, and the extent of her relationship with the man who delivered billions to Najib on a silver platter, Low Taek Jho, come under a forensic spotlight as Lopez exposes the shocking series of events that culminated in the monstrous enormity of Najib's deeds. It also depicts how the earth shook for the main players—in Malaysia, Australia, Singapore, the US and Middle Eastern states—once news broke of the biggest case of corruption in world history.

The Siege Within is the untold story behind the political crime that continues to make world headlines, and why a nation so full of promise has been brought to its knees.