A comprehensive education guide to pre-IPO investing — how to access high-growth private companies before they go public. Covers secondary market infrastructure, the major platforms (Hiive, Forge, EquityZen, Linqto), valuation frameworks for private companies, due diligence frameworks, legal and tax considerations, portfolio construction, and real case studies. Includes seven appendices covering investment checklists, sector landscapes, tax planning, platform comparisons, and the psychology of pre-IPO investing.