Since I've read a lot on the whole ISIS situation, I thought I'd list a few of the things that have been helpful to me understanding the many aspects of this issue.  These run the gamat from really serious to partially comedic, but they all provide helpful perspective.
The Onion's original 2003 pre-war prophecy of all of this 
This war will destabilize the entire Mideast region and set off a global shockwave of terrorism    
A pretty good summary of some of the most important ISIS shyt 
9 questions about ISIS you were too embarrassed to ask    
Wikipedia's ISIS page: 
Islamic State of Iraq and the Levant
A history of ISIS's spread  
How ISIS spread in the Middle East
The connection between the invasion of Iraq and the growth of ISIS 
Did the Bush invasion of Iraq "create" ISIS?  
How the current ISIS leadership was predominantly formed in American-run prisons 
ISIS the inside story    
More on that prison where ISIS leaders came together  
Camp Bucca the US prison that became the birthplace of ISIS   
What Saddam did to sort of set all this shyt up  
The hidden hand behind the Islamic State militants?  Saddam Hussein's
How the US-propped Iraqi president did his fair share to cause this shyt too  
Sunnis on their treatment in Malaki's Iraq 
Why Assad is heavily responsible for ISIS's growth and strength 
The problem at the heart of ISIS    
More about Assad having done some evil, evil shyt to make ISIS run  
Suspects into collaborators: Assad and the Jihadists 
Some observations about ISIS's propaganda magazine 
7 things I learned reading every issue of ISIS's magazine    
Why ISIS wants us to go to war with them, with information on how they recruit: 
The War ISIS Wants    
More on the connection between ground war and prophecy  
US seeks to avoid ground war welcomed by Islamic State
Why ISIS wants us to hate Muslims and refugees 
ISIS wants us to destroy the grey zone, here's how we defend it    
The King of Jordan on ISIS and refugees 
King Abdullah: ISIL "a war within Islam"    
What happened when some Syrian Sunnis tried to revolt against ISIS 
Syria tribal revolt against ISIS ignored, fueling resentment   
Why some Iraqis fight for ISIS 
What I discovered from interviewing ISIS prisoners    
ISIS's attempts to win hearts and minds  
The Islamic State of Iraq and Syria has a consumer protection office   
Hostage of ISIS says that bombing is the worst idea possible 
Former ISIS hostage says that airstrikes are a trap    
Former kidnapping victim of ISIS says that stability in the region is necessary to defeat them 
What I learned about ISIS from being kidnapped by its predessor
Extensive piece on the practicals of how ISIS grew, and wants to grow 
The Islamic State's strategy: lasting and expanding  
The horrifically evil stuff ISIS does to minority women  
ISIS enshrines a theology of rape 
How ISIS exploits teenagers for its aims  
ISIS recruits teenagers as suicide bombers 
ISIS theology from the perspective of some "true believers" 
What ISIS really wants   
 
Actual Muslim scholars telling the ISIS guys they're full of shyt 
Muslim scholars make the theological case against the Islamic State    
Some of the theological pull of ISIS 
Lure of the Caliphate   
Pull to ISIS is based on desires of youth and power, not theology 
ISIS: a contrived ideology justifying barbarism and sexual control
More abou the people who go to fight for jihad 
Foreign Fighters in Syria
How Iraqi intelligence officers are using their craft to make ISIS effective 
Over 100 former Saddam Hussein-era officers make up ISIS leadership
More on that 
Islamic State is led by over 100 former Iraqi officers
Internal documents show that the Baathists, not the religious nuts, may be running the whole show 
Islamic State files show structure of Islamist terror group 
More on the Sunni/Shi'i divide and what the Baathists want to do 
ISIS forces that now control Ramadi are ex-Baathist Saddam loyalists
ISIS has very little popular support among Muslims 
ISIS has almost no popular support in Egypt, Saudi Arabia, or Lebanon  
Or in other Muslim countries  
In nations with significant Muslim populations much distain for ISIS   
How ISIS actually manages to sell its shlock to foriegn women  
ISIS and women    
Where the Islamic State's money comes from 
How ISIS makes its money    
The coalition against ISIS - including the Taliban and Hezbollah 
The astonishing 54 countries and groups battling ISIS    
Some failures of our military "victories" against ISIS 
Lessons from the liberation of Sinjar   
R's/D's following the same playbook 
No Republican wants to admit it, but their strategy on ISIS is basically the same as Obama's   
Some nonviolent ways to address the ISIS problem 
65 religious leaders send open letter to President Obama   
Some costs and benefits of various military strategies against ISIS 
Weighing the military arguments
An argument that the best thing to do is to simply contain them 
The best strategy against ISIS in Syria and Iraq: Containment