If you intend to plan and build a wireless network you can find a lot of information about the actual planning phase of the radio network on this site. But there is more than bare radioplanning like building up a site traffic considerations etc.
As the objective of this website is not to cover the full scope of planning and building a wireless network you are advised to look at the site of "Wireless Networking in the Developing World" at http://wndw.net/
The book is describing all steps of the preparation to planning of wireless networks until the evaluation of the network for the purpose of evaluation. In between also all RF subjects that are required are described in a understandable manner.
At the site of WNDW you can download the book "Wireless Networking in the Developing World" in various languages. (English, Spanish, French, Arabic, Portuguese, and Indonesian)
For those who are not able to reach the site of WNDW a local copy of the second edition of the book can be downloaded here:
The book and PDF files are published under a Creative Commons Attribution-ShareAlike 3.0 license.