KDP categories · Top KDP authors
CertPath PREP: Amazon KDP author data
As of Nov 6, 2026, CertPath PREP has 8 books on Amazon, 8 of them on a best-seller list in the last 30 days (best rank #3), mostly in Environmental, Professional, Chemical Engineering.
| Median price | $9.99 |
|---|---|
| Price range (middle 50%) | $0.99 – $22.49 |
| Median reviews | 26 |
| Total reviews | 202 |
| New books (30 days) | 4 |
| Breakout books (30 days) | 3 |
What stands out
- 100% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $9.99, 52% below the median of their main category, Environmental.
- 4 new books in the last 30 days, 3 of them broke into a Best Sellers list.
CertPath PREP's best-ranked books
-
EPA 608 Universal Certification Study Guide: Get Certified and Work Legally on HVAC/R Systems. Pass on Your First Try with the 21-Day Study System, Practice Questions, Flashcards & Timed Mock Exams
by CertPath PREP
- Price$29.99
- Rating3.9
- Reviews33
-
MPRE Study Guide: Clear the Last Hurdle to Bar Admission. Pass on Your First Attempt with the Diagnose-Decode-Verify System, Timed Mock Exams, Decoded Answer Traps & Step-by-Step Explanations
by CertPath PREP
- Price$0.99
- Rating5.0
- Reviews19
- Published2026-09
-
EPA 608 Universal Certification Study Guide: Get Certified and Work Legally on HVAC/R Systems. Pass on Your First Try with the 21-Day Study System, Practice Questions, Flashcards & Timed Mock Exams
by CertPath PREP
- Price$9.99
- Rating3.9
- Reviews33
-
CNA Study Guide: Pass the Certified Nursing Assistant Exam on Your First Try with the Diagnostic-First Study System. Practice Tests with Full Rationales, Flashcards & Timed Exam Simulator
by CertPath PREP
- Price$0.99
- Rating5.0
- Reviews27
-
CPC Exam Prep Workbook 2026-2027: Medical Coding Certification Study Guide with 2,200 Practice Questions, CPT, ICD-10-CM, HCPCS, E/M, Modifiers, and Full-Length Mock Exams with Answer Explanations
by CertPath PREP
- Price$37.99
- Rating4.0
- Reviews20
-
CPC Exam Prep Workbook 2026-2027: Medical Coding Certification Study Guide with 2,200 Practice Questions, CPT, ICD-10-CM, HCPCS, E/M, Modifiers, and Full-Length Mock Exams with Answer Explanations
by CertPath PREP
- Price$9.99
- Rating4.0
- Reviews20
-
Station Agent Exam Prep: The Rank-Higher System to Pass the NYC Transit Exam and Get Called First from the Eligible List with Practice Exams, Clear Explanations, Flashcards & Exam Simulator Platform
by CertPath PREP
- Price$0.99
- Rating4.9
- Reviews25
-
CNA Study Guide: Pass the Certified Nursing Assistant Exam on Your First Try with the Diagnostic-First Study System. Practice Tests with Full Rationales, Flashcards & Timed Exam Simulator
by CertPath PREP
- Price$19.99
- Rating5.0
- Reviews27
Main categories
FAQ
How many books does CertPath PREP have on Amazon?
KDPTop tracks 8 of their books; 8 made an Amazon list in the last 30 days.
Which categories does CertPath PREP publish in?
Their books chart most often in Environmental, Professional, Chemical Engineering.
How does CertPath PREP price their books?
The median price is $9.99; half of the books cost $0.99–$22.49.
Has CertPath PREP released new books recently?
4 new books in the last 30 days, 3 of which reached a Best Sellers list.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.