Put on the kettle and kick your feet up this Sunday while you cast your eye over some of our favourite long reads from the last seven days.

From a detailed examination of how Islamic State fund their war and are changing the face of terrorism, to a look back at the Panorama special where Princess Diana opened up about her marriage and her personal battles, here are the best of the long reads from Newstalk.com this week. 

Part One: How IS created the system that redefined terrorism

The Islamic State campaign of terror has been driven by a businesslike approach to their organisation and funding, showing that the world's most feared terrorist group has a lot more in common with big businesses than we might expect.

Part Two: How Islamic State fund their war

The so-called Islamic State (IS) has become the world's most feared and powerful terrorist group. It has also become its richest. A complex, corporate approach to its war has seen the group open up a vast array of income sources that have made it a more daunting foe than any encountered before.

Why you shouldn't joke about International Men's Day

This week saw the celebration of International Men's Day, wedged alongside International TV day and International Toilet Day, sharing November 19th on the calendar. As apt as that confluence may seem to some, there's more to the day than jokes about privilege on social media. 

20 years after the Princess Diana 'Panorama' special, what are the greatest TV interviews of all time?

It was a masterstroke of TV interviewing. Diana, Princess of Wales, dressed in a black suit and white blouse, head bobbed forward and looking up. "There were three of us in this marriage, so it was a bit crowded".

Twenty years ago, the BBC pulled off something of a royal coup, as Panorama journalist Martin Bashir spoke to one of the most famous women in the world, about her marriage, her relationship with Britain’s royalty, her depression, and her battles with bulimia, but where does it sit alongside the greatest television interviews ever?

Outside the Box: 'I'm a Celebrity...' is a journey into the shart of darkness

What can be said of a show that’s essentially been the same thing, year in, year out since 2002? Now in its 15th season on our TV screens, the only perceptible change to have happened to I’m a Celebrity... Get Me Out of Here! is that it’s switched over from TV3 to UTV Ireland – with the troubled channel’s hopes it will be a windfall hardly helped by them dropping the feed right before the culminating moment of the first episode.