If you're prepping for the CTS-D exam, this book is your golden ticket. I spent weeks with it, and honestly, it covers EVERYTHING—though don’t expect to just memorize answers. The test forces you to apply concepts, and this guide nails that approach.

That said… the typos? Yeah, they’re real. A few had me double-checking formulas (annoying), but hilariously, those same errors appear on the actual exam. So in a weird way, it’s like insider intel.

Where this book shines? Real-world relevance. Even after passing, I keep grabbing it mid-project for quick reference—the diagrams (wish they were color!) and math examples save me daily. Pro tip: Do every practice calculation. Skipping them = exam day regret.

Delivery drama aside (thanks, mystery neighbor!), it’s worth every penny. Just treat it like a workbook—highlight, scribble margins, and actually *use* it.