The one set between 4 and 5 is by Kieron Gillen. This link is for Vol. 1 of 4.
Star Wars: Darth Vader Vol. 1 (Star Wars (Marvel)) https://www.amazon.com/dp/0785192557/ref=cm_sw_r_cp_apa_JubMAbTD07K2J

The one set between 3 and 4 is written by Charles Soule has one volume and is currently ongoing.

Star Wars: Darth Vader: Dark Lord of the Sith Vol. 1: Imperial Machine https://www.amazon.com/dp/1302907441/ref=cm_sw_r_cp_apa_4xbMAbV59P8H8

I order them on Amazon!

If you are interested in this era of Star Wars and are looking for a good place to start, I would recommend beginning at Darth Vader: Dark Lord of the Sith Volume 1: Imperial Machine that you can get here: https://www.amazon.com/Star-Wars-Darth-Imperial-Machine/dp/1302907441/ref=mp_s_a_1_2?crid=1HQ3B0VTFDA0E&keywords=darth+vader+dark+lord+of+the+sith+volume+1&qid=1555325053&s=gateway&sprefix=darth+vader+dark+&sr=8-2

This series is the very best of the best when it comes to both Star Wars and comics. It’s 100% canon and picks up immediately after Revenge of the Sith. This is the series that the panels from the OP are from with the Purge/Inquisitor Troopers and the Second Sister.

Happy reading!

Amazon has them for a good price https://www.amazon.com/Star-Wars-Darth-Imperial-Machine/dp/1302907441

ELIGIBLE AS OF MIDDLE/END OF APRIL

• BLACK BOLT (2017)
  

• 1-6, collected in "Black Bolt Vol. 1: Hard Time" by Saladin Ahmed and Christian Ward
  

• DARTH VADER (2017)
  

• 1-6, collected in "Star Wars: Darth Vader: Dark Lord of the Sith Vol. 1: Imperial Machine" by Charles Soule and Jim Cheung
  

• DEADPOOL KILLS THE MARVEL UNIVERSE AGAIN (2017)
  

• 1-5, collected in "Deadpool Kills the Marvel Universe Again" by Cullen Bunn and Dalibor Talajic
  

• DEFENDERS (2017)
  

• 1-6, collected in "Defenders Vol. 1: Diamonds Are Forever" by Brian Michael Bendis and David Marquez
  

• I AM GROOT (2017)
  

• 1-5, collected in "I Am Groot" by Chris Hastings and Flaviano
  

• NICK FURY (2017)
  

• 1-6, collected in "Nick Fury: Deep-Cover Capers" by James Robinson and ACO
  

• VENOMVERSE (2017)
  

• 1-5, collected in "Venomverse" by Cullen Bunn and Iban Coello
  

• MONSTERS UNLEASHED (2017)
  

• 1-6, collected in"Monsters Unleashed Vol. 1: Monster Mash" by Cullen Bunn and David Baldeon
  

• CABLE (2017)
  

• 1-5, collected in "Cable Vol. 1: Conquest" by James Robinson and Carlos Pacheco
  

  
  ----------------------
  
  

• ALL-NEW GUARDIANS OF THE GALAXY (2017)
  

• 3, 5, 7, 9, 11-12 collected in "All-New Guardians of the Galaxy Vol. 2: Riders in the Sky" by Gerry Duggan and Aaron Kuder
  

• STAR WARS: DOCTOR APHRA (2016)
  

• 9-13, collected in "Star Wars: Doctor Aphra Vol. 2: Doctor Aphra and the Enormous Profit" by Kieron Gillen and Kev Walker
  

• DOCTOR STRANGE (2016)
  

• 21-26, collected in "Doctor Strange Vol. 5: Secret Empire" by John Barber, Dennis Hopeless, and various artists
  

  
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• DEFENDERS (1972-1986)
  

• 1-41, collected in "Defenders Masterworks Vol. 1-5" by various authors and artists
  

• 92-109, collected in "Defenders Epic Collection: The Six-Fingered Hand Saga