KDP categories · Top KDP authors
Clarence B. Barrios: Amazon KDP author data
Clarence B. Barrios has 46 books on Amazon, 35 of them on a best-seller list in the last 30 days (best rank #1), mostly in Vocational Tests, Civil Service, Careers.
46Books on Amazon
35Listed in 30 days
4.6Average rating
| Median price | $28.99 |
|---|---|
| Price range (middle 50%) | $9.99 – $29.99 |
| Median reviews | 5 |
| Total reviews | 191 |
| New books (30 days) | 5 |
| Breakout books (30 days) | 2 |
What stands out
- 76% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- 5 new books in the last 30 days, 2 of them broke into a Best Sellers list.
Clarence B. Barrios's best-ranked books
-
California C-10 Electrical Contractor License Exam Prep 2026–2027: Complete CSLB Trade & Law and Business Study Guide with 12 Full-Length Test, 1200+ Practice ... (The Barrios C-10 Method Book 1)
by Clarence B. Barrios
- Price$9.99
- Rating5.0
- Reviews2
-
USCG Captain’s License Study Guide 2026-2027: OUPV & Six-Pack Exam Prep: Rules of the Road, Chart Plotting, Navigation & Safety with 640+ Practice ... Explanations (The Barrios Captain's Method)
by Clarence B. Barrios
- Price$27.99
- Rating4.6
- Reviews15
-
EIAT Study Guide 2026–2027: Elevator Industry Aptitude Test Prep with 900+ Practice Questions, 10 Full-Length Exams, Math, Mechanical & Tool Review ... Apprenticeship (The Barrios EIAT Method)
by Clarence B. Barrios
- Price$29.59
- Rating5.0
- Reviews8
-
CPA FAR EXAM PREP 2026-2027: Master All 4 Domains with 1500+ Questions, 10 Full-Length Exams, 500+ Flashcards and Concise Answer Explanations
by Clarence B. Barrios
- Price$9.99
- Rating4.6
- Reviews3
-
AAPC CPC Study Guide 2026-2027: Complete Content Review, 20 Full-Length Tests, 2000+ Practice Questions, and Open-Book Code Navigation Strategy for Exam Day (The Barrios CPC Method 1)
by Clarence B. Barrios
- Price$9.99
- Rating5.0
- Reviews1
-
ASE G1 Maintenance and Light Repair Study Guide 2026-2027: Test Prep with 1100+ Practice Questions, 20 Full-Length Exams, & Detailed Answer Explanations (The Barrios ASE G1 Method)
by Clarence B. Barrios
- Price$30.99
- Rating5.0
- Reviews6
-
HAWAII FIREFIGHTER EXAM STUDY GUIDE 2026-2027: All-in-One Written and Physical Ability Test Guide with 1000+ Practice Questions and Full Answer ... ... Barrios Hawaii Firefighter Method Book 1)
by Clarence B. Barrios
- Price$9.99
- Rating5.0
- Reviews2
-
CTS Certified Technology Specialist Exam Prep 2026-2027: Complete Study Guide with 2000+ Practice Questions, 18 Full-Length Exams, AV Signal Flow, and ... (The Barrios CTS Method Book 1)
by Clarence B. Barrios
- Price$9.99
- Rating5.0
- Reviews3
-
EPA 608 Certification Study Guide 2026-2027: Updated HVAC Refrigerant Handling Exam Prep for Core, Type I, II, III & Universal — 7 Full-Length Tests, ... Explanations (The Barrios EPA 608 Method)
by Clarence B. Barrios
- Price$25.99
- Rating2.9
- Reviews2
-
PRAXIS SOCIAL STUDIES 5581 STUDY GUIDE 2026-2027: Complete Content Review, 5 Full-Length Practice Tests, 700+ Questions with Answer Explanations, and ... ... Praxis Social Studies 5581 Method Book 1)
by Clarence B. Barrios
- Price$9.99
- Rating5.0
- Reviews6
Main categories
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.