This is an ORIGINAL Cummins ISC QSC8.3 Diesel Engine troubleshooting and repair manual. (1999 printing) This manual has super illustrations as well as having in-depth diagnostic, troubleshooting and repair information on these Famous Cummins Diesel Engines. The covers are in FAIR to GOOD overall condition. (see pics, front bottom has a nice rip in it) The spline is tight and intact with NO splits. The pages of this manual are super clean and in GOOD overall condition. (see pics) This manual contains 20+ sections or about 350 pages that cover these Famous Cummins Diesel Engines from A to Z. (see pics for index) This manual is in GOOD overall condition. Please feel free to contact me at any time with any and all questions, thanks for viewing………………………………………..