Attack on Titan: Before the Fall Vol 14

The prequel to the number one bestselling Attack on Titan and winner of the Diamond Gem Award for best manga continues! FACE YOUR FEARS An ultimatum has been issued: for the Survey Corps to continue the good fight of helping humanity expand beyond the Walls again, they must mount an expedition and prove that the new Vertical Maneuvering Equipment is capable of killing a Titan. But part of the preparation is to actually see the Titans and understand what humanity's greatest foe really looks like--a challenge more daunting than any written test...

Source: Penguin Random House API