Reddit reviews Dark Tower: The Gunslinger Omnibus Slipcase

Ok i figured what the Hell going on know so for the Omnibus book it's only come's with

• The Gunslinger Born
  
  
• The Long Road Home
  
  
• Treachery
  
  
• The Sorcerer
  
  
• Fall of Gilead
  
  
• Battle of Jericho Hill
  
  Which = the The Dark Tower part of the comics that what the wika say's to get the others parts it's the Dark Tower: The Gunslinger Omnibus Slipcase that comes with
  
  
• The Journey Begins
  
  
• The Little Sisters of Eluria
  
  
• The Battle of Tull
  
  
• The Way Station
  
  
• The Man in Black
  
  
• Sheemie's Tale
  
  
• Evil Ground
  
  
• So Fell Lord Perth
  
  So it look like there going to be one more for the The Dark Tower: The Drawing of the Three Part of the comic books
  

This sounds like a big commitment, but if you've read the books you won't want to mess around. Just go with this. You won't be disappointed.

https://www.amazon.com/Dark-Tower-Gunslinger-Slipcase-Hardcover/dp/0785188703/ref=pd_bxgy_14_img_2?_encoding=UTF8&psc=1&refRID=MDEWNM2FMT7EB2CBKMEA

part 1 and part 2 but drawing of the three hasn't been collected yet.

Which one is the first?
https://www.amazon.com/Dark-Tower-Omnibus-Stephen-King/dp/0785155414
or
https://www.amazon.com/Dark-Tower-Gunslinger-Slipcase-Hardcover/dp/0785188703

Or does the order really matter?

http://www.amazon.com/Dark-Tower-Gunslinger-Omnibus-Slipcase/dp/0785188703/ref=sr_1_2?ie=UTF8&qid=undefined&sr=8-2&keywords=dark+tower+omnibus

Is it this?

https://smile.amazon.co.uk/Dark-Tower-Gunslinger-Omnibus-Slipcase/dp/0785188703/ref=sr_1_1?ie=UTF8&qid=1518900597&sr=8-1&keywords=dark+tower+marvel+omnibus