Book 1

This is the first book of the physical release of Tower of God. It covers the first eleven chapters, not including the preview, with story of this book ending after the end of Lero-Ro's Test.

Headon's Floor

 * Ch.01: 1F - Headon's Floor (1) | (p. 5-36)
 * Ch.02: 1F - Headon's Floor (2) | (p. 37-72)
 * Ch.03: 1F - Headon's Floor (3) | (p. 73-94)
 * Ch.04: 1F - Headon's Floor (4) | (p. 95-126)

Evankhell's Hell

 * Ch.05: 2F - Evankhell's Hell (1) | (p. 127-148)
 * Ch.06: 2F - Evankhell's Hell (2) | (p. 149-168)
 * Ch.07: 2F - Evankhell's Hell (3) | (p. 169-190)
 * Ch.08: 2F - Evankhell's Hell (4) | (p. 191-230)

Lero-Ro's Test

 * Ch.10: 2F - Lero-Ro's Test (2) | (p. 231-254)
 * Ch.10: 2F - Lero-Ro's Test (2) | (p. 255-272)

Yu Han Sung's Examination

 * Ch.11: 2F - Yu Han Sung's Examination (1) | (p. 273-287)

Additional Content
There is no afterword written by SIU or additional content, maybe due to it being release the same day as the second book, which does have additional content.