See the online study aids for Jurisdiction & Judgments (Civil Procedure)
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.
Moore's Federal Practice - Civil
Wright & Miller, Federal Practice & Procedure
Court Rules
The Center for Computer-Assisted Legal Instruction (CALI) provides online interactive tutorials on legal topics. See a law librarian at the Reference Desk for your Mercer's access code.