As a previous development engineer, I've been partial to the following books:
Real estate development principles and process
by Mike Miles for the Urban Land Institute
Land Development
By Daisy Linda Kone (also goes by Linda Kone)
They each touch on the overall land development process, calculating potential costs and profits, zoning laws, construction, and also sales and marketing.
They're written for the serious residential land developer, but all the principles can, and should, be applied to those developing just one or plots as well.
Anyone planning to get serious about purchasing land you can check out the urban land institute's website. They're the largest non-profit real estate organization in the world and they're focused on land use and development.
Also, search for an article on this site that I wrote about pricing land for profit. You can also click http://www.biggerpockets.com/renewsblog/2009/10/02/developing-real-estate-price-land-profit/ to access it. It can help you set the price for land to make sure you build in your profit.
Hope that helps.