The way The Walking Dead comic issues are broken into softcover books, hardcovers, compendiums and omnibuses can be a little confusing at times, so here’s a list of how the issues are broken down into each of those.

Softcover Paperback Books
Volume 1: Issues 1-6, buy on Amazon.com
Volume 2: Issues 7-12, buy on Amazon.com
Volume 3: Issues 13-18, buy on Amazon.com
Volume 4: Issues 19-24
Volume 5: Issues 25-30
Volume 6: Issues 31-36
Volume 7: Issues 37-42
Volume 8: Issues 43-48
Volume 9: Issues 49-54
Volume 10: Issues 55-60
Volume 11: Issues 61-66
Volume 12: Issues 67-72
Volume 13: Issues 73-78
Volume 14: Issues 79-84
Volume 15: Issues 85-90
Volume 16: Issues 91-96
Volume 17: Issues 97-102
Volume 18: Issues 103-108
Volume 19: Issues 109-114
Volume 20: Issues 115-120
Volume 21: Issues 121-126
Volume 22: Issues 127-132
Volume 23: Issues 133-138
Volume 24: Issues 139-144
Volume 25: Issues 145-150
Volume 26: “Call to Arms” – Issues 151-156
Volume 27: “The Whisperer War” – Issues 157-162
Volume 28: “A Certain Doom” – Issues 163-168
Volume 29: Issues 169-174

Hardcover Books
Book 1: Issues 1-12, buy on Amazon.com
Book 2: Issues 13-24, buy on Amazon.com
Book 3: Issues 25-36, buy on Amazon.com
Book 4: Issues 37-48
Book 5: Issues 49-60
Book 6: Issues 61-72
Book 7: Issues 73-84
Book 8: Issues 85-96
Book 9: Issues 97-108
Book 10: Issues 109-120
Book 11: Issues 121-132
Book 12: Issues 133-144

Compendiums
Compendium 1: Issues 1-48
Compendium 2: Issues 49-96
Compendium 3: Issues 97-144

Omnibuses
Omnibus 1: Issues 1-24
Omnibus 2: Issues 25-48
Omnibus 3: Issues 49-72
Omnibus 4: Issues 73-96
Omnibus 5: Issues 97-120
Omnibus 6: Issues 121-144

This information comes from thewalkingdead.com