It is important to start your research with Secondary Sources. They provide general overviews of many elements of IP law, and can help point you in the right direction for next steps.
These encyclopedias contain detailed sections on Intellectual Property, including patents, trademarks, and copyrights, that provide summaries of the IP landscape, along with basic practical examples of IP work.
These treatises are easily accessible and provide detailed overviews of various IP topics. They can provide direction and a solid foundation for further research once a more specific IP topic has been chosen.
These resources are scholarly periodicals that publish IP-focused articles written by practitioners, law professors, and law students.