I couldn't believe how gruesome this story was, but it was enjoyable. If you're getting this for your kids though, I would suggest that you wait until they are at least in 4th or 5th grade.
Volume 30 begins with Chapter 268~277
Volume 28 begins with Chapter 248~257
Volume 35 begins with Chapter 319~328
Volume 34 begins with Chapter 309~318
Volume 33 begins with Chapter 298~308
Volume 32 begins with Chapter 288~297
This volume begins with Chapter 278-287.
Volume 29 begins with Chapter 258~267
Volume 25 begins with Chapter 218~227