Amazon has put up a listing for the Attack on Titan Season 3 Part 1 Manga Box Set, revealing a release date. According to the product page, the bundle will be coming out on the 16th of October in the North American region. If you are interested, you can preorder the Season 3 Part 1 Manga Box Set with this link from the online retailer.
You can also find Amazon’s product description of the bundle below:
Continue your journey outside the walls with the manga that inspired the first half of season 3 of the hit anime Attack on Titan! Includes FIVE books (Vols. 13-17), plus an EXCLUSIVE book of Attack on Titan short stories never published in English!
After helping the Garrison to victory, retaking Trost District from the Titans, Eren awakens in a prison cell. He may be a hero to the common people, but among the leaders of humanity, fear of Eren’s mysterious powers threatens his continued survival. It’s only the insistence of the tenacious and pragmatic Erwin Smith, leader of the Survey Corps, that wins Eren a chance: Prove himself outside the Walls, and bring the evidence from his family home back from Titan territory, and the rest of the military will let him live. But soon after the Corps passes through the gate, a new and terrible threat appears — one that Erwin may know more about than he’s letting on.