Reddit reviews Attack on Titan 27

The cover for the first one is a stand-in. They always use that one when the cover hasn't been revealed yet but they want to have pre-orders available. I guess they just forget to change it to the Vol.26 cover.

As you can see here, they also use the cover with RBA as titans and EMA in front. Just buy whichever's cheaper or more convenient for you.

I got up to volume 28 on amazon here ill give you volume 23 to vol 28:
23: https://www.amazon.co.uk/Attack-Titan-23-Hajime-Isayama/dp/1632364638/ref=sr_1_1?keywords=attack+on+titan+23&qid=1570978455&sr=8-1
24: https://www.amazon.co.uk/Attack-Titan-24-Hajime-Isayama/dp/1632365359/ref=sr_1_1?keywords=attack+on+titan+24&qid=1570978483&sr=8-1

25: https://www.amazon.co.uk/Attack-Titan-25-Hajime-Isayama/dp/1632366134/ref=sr_1_1?keywords=attack+on+titan+25&qid=1570978494&sr=8-1

26: https://www.amazon.co.uk/Attack-Titan-26-Hajime-Isayama/dp/1632366541/ref=sr_1_1?keywords=attack+on+titan+26&qid=1570978506&sr=8-1

27: https://www.amazon.co.uk/Attack-Titan-27-Hajime-Isayama/dp/1632367173/ref=sr_1_1?keywords=attack+on+titan+27&qid=1570978517&sr=8-1

28: https://www.amazon.co.uk/Attack-Titan-28-Hajime-Isayama/dp/1632367831/ref=sr_1_1?keywords=attack+on+titan+28&qid=1570978527&sr=8-1