( longbow can be crafted with the following recipes

Skill used: fabrication
Required skills: archery(3)
Difficulty: 3
Time to complete: 15 minutes
Tools required:
> 1 tool with cutting quality of 1
Components required:
> 1x heavy stick OR 1x two by four
> 2x long string OR 200x thread OR 200x sinew OR 200x plant fiber
This recipe can be found in the following books when fabrication is at least the required level:
Zen and the Art of Archery (level 2)
The Bowyer's Buddy (level 1)
Lessons for the Novice Bowhunter (level 3)