Handböcker, manualer etc, Kojor, Handbooks and manuals, Tree houses 

From the back cover:

Few building projects garner as much excitement as a treehouse; built for fun and built to last, a treehouse can provide you and your loved ones a memorable place to rest and play for years to come. This updated 2nd edition of The Complete Guide to Treehouses provides updated information and techniques for arboreal carpenters of all skill levels. Not only will you learn the basics of creating elevated platforms and how to erect walls and roofs around branches and trunks, but you'll also find complete walk-throughs for two distinct treehouses, as well as detailed designs for six more. Now that you've got the info, all you need is a tree and a few basic tools to begin one of the most enjoyable construction projects you've ever known.

This book includes:

- Basic carpentry introduction
- 8 complete plans with construction drawings
- Planning & design ideas
- Options and ideas for 1-, 2-, and 3-trunk treehouses