the torn pages are random drops from gus (the grey goose).
the manual itself is crafted in the outpost (3 pages per manual).
once crafted and collected, the manual is stored in an invisible cloud (i.e. NOT in the inventory). you can see how many manuals you have by clicking on the mother goose; this is also how you give mother goose the manual.
the mother goose is the prize you won on step 4 of the main quest. you can find her in the cellar. you need to place her on the farm to do the above ^^^.
hope this helps.