Spellbook runs inside Microsoft Word as an add-in, so transactional lawyers can draft, redline, and review contracts without leaving the tool they already use. It leverages large language models to flag risky clauses, suggest alternative language, draft from scratch or from saved clause libraries, and answer plain-language questions about specific contract terms. An Associate feature handles multi-document workflows, useful for deals that span several agreements at once. It also benchmarks contracts against industry standards, giving attorneys a quick read on where a draft deviates from market norms. The focus is narrow and deliberate: transactional work — NDAs, service agreements, M&A documents — rather than litigation support or general legal research. That specificity, combined with the low-friction Word integration, makes it a practical first legal-AI trial for solo practitioners and small transactional firms. Spellbook was among the earliest generative-AI tools purpose-built for contract work and has built steady adoption in the legal-tech market.