i would suggest 8051 microcontroller by mazidi to understand the basic of microcontroller programming…also if ur new in 8051 u should use 89s51or 89s52 controllers to begin with…they r cheap and easy to program…heres the link for mazidi..
http://www.4shared.com/office/By7zFC7d/The_8051_Microcontroller_and_E.html