Two-book pair
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Candidates who sit one of these exams very often sit the other. Buy the pair and you pay less than the two books cost separately — the same PDF and EPUB files, delivered the moment payment clears.
What's in the pair
CSLB Law & Business — Complete Study Guide (2026)
All 7 exam sections, written to current 2026 law — the numbers the outdated books still get wrong. PDF + EPUB.
Read the free sample and the full details →CSLB C-20 HVAC Trade Exam Study Guide (2026)
The C-20 trade exam asks a working installer to prove it on paper. This guide covers load and duct design, installation practice, the refrigeration cycle through the A2L transition, diagnostics, and the code and safety rules — with the numbers that move each code cycle flagged rather than stated as permanent. PDF + EPUB.
Read the free sample and the full details →- CSLB Law & Business — Complete Study Guide (2026)$24.99
- CSLB C-20 HVAC Trade Exam Study Guide (2026)$14.99
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