See the online study aids for Property
Treatises - Scholarly treatment of an area of law; often many volumes and usually updated annually. These titles were originally authored by big names in the field. We even refer to them by the name of the author.
Tiffany on Real Property (The Law of Real Property)
The Center for Computer-Assisted Legal Instruction (CALI) provides online interactive tutorials on legal topics. See a law librarian at the Reference Desk for Mercer's access code.