I have the following duplicate books for sale all are in very good condition unless noted:

Caterpillar 50 Tractor Sales Book 6x9 38 pages Form #P938 Printed April 1932 $ 150.00
Caterpillar Condensed Product Catalog 1936 8x8 42 pages Form #3342 $ 175.00
Caterpillar D6 Sales Brochure 30 pages Free to any one who buys something else cause in poor condition
Caterpillar Off-Road Tire Maintenance Manual 6x9 44 pages Form S-1106 covers anything that has a rubber tire $20.00 loose cover
Caterpillar Corn Brochure (very hard to find) 6x9 15 pages Form SL1570-R Printed May 1930 $ 140.00 slight stains on cover but inside is great, lots of color and photos
Caterpillar Picture Book ( these do not come up for sale often) 6x9 19 pages Form SL 1615R Printed Feb 1930 $ 60.00 has loose center page

Caterpillar Comics:
Story of Mid City and its Sanitary Landfill (this can be very hard to find) 8x10 12 pages Form # 717-30909 D424 $ 130.00
Maintenance Guide D6, D4, D2 8x10 22 pages Form # 717-32548DE768 $ 30.00 cover has writing and rubs
Maintenance Guide D8, D7, D6, D4, D2 8x10 22 pages Form # 117-30247 D204 $40.00

Other:
Baker Maney Self Loading Scrapers Bulletin # 263 8.5x11 23 pages 263-5M-12-29 Printed in Dec 1929 $ 45.00

still for sale, any reasonable offer will be considered.