It is a collector's guide to International Harvester tools. It is published by a fellow named Gilbert A. Irps. To order it, you need to write him at:
Gilbert Irps
3156 Old Waldron Road
Kankakee, IL 60901-6013
Gilbert puts out an extensive listing of International Harvester & merged companies-only tools list. It is at least 27 pages long (8 1/2" x 11") although he does add to it as time goes on from what I understand, so it could be more. I have no idea if he charges for it, or if he gives it out for free.
Is Irps still around? I haven't heard much about him in a while.