This add-on service provides exam-formatted books that are pre-tabbed and pre-highlighted to match the reference structure allowed by PSI and other contractor-licensing test vendors, supporting candidates preparing for contractor license exams by improving navigation of code sections, safety standards, business and law requirements, and trade-specific references. The preparation method aligns with common open-book exam rules and is used across general contractor, electrical, mechanical, plumbing, and specialty trade exam scopes to accelerate lookup speed and reinforce keyword-based studying for licensing.