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L.K. Duncan: Amazon KDP author data
L.K. Duncan has 15 books on Amazon, 14 of them on a best-seller list in the last 30 days (best rank #3), mostly in Civil Service, Guides, Interviewing.
15Books on Amazon
14Listed in 30 days
4.8Average rating
| Median price | $16.99 |
|---|---|
| Price range (middle 50%) | $9.99 – $19.52 |
| Median reviews | 15 |
| Total reviews | 212 |
| New books (30 days) | 14 |
| Breakout books (30 days) | 11 |
What stands out
- 93% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $16.99, 43% below the median of their main category, Civil Service.
- 14 new books in the last 30 days, 11 of them broke into a Best Sellers list.
L.K. Duncan's best-ranked books
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Police Sergeant Oral Board Workbook: The COMMAND Method: Scenario-Based Interview Preparation, Supervisory Decision-Making, and Structured Response ... ... Candidates (COMMAND Method Series Book 1)
by L.K. Duncan
- Price$0
- Rating4.9
- Reviews15
- Published2026-09
-
Police Officer Oral Board Workbook: The COMMAND Method: Interview Preparation, Scenario-Based Questions, Sample Answers, and Strategies for Law Enforcement Applicants (COMMAND Method Series Book 3)
by L.K. Duncan
- Price$9.99
- Rating4.6
- Reviews15
-
Police Lieutenant Oral Board Workbook: The COMMAND Method: Scenario-Based Interview Preparation, Organizational Leadership, and Command Decision-Making ... Candidates (COMMAND Method Series Book 2)
by L.K. Duncan
- Price$9.99
- Rating4.7
- Reviews15
-
Police Sergeant Oral Board Workbook: The COMMAND Method: Scenario-Based Interview Preparation, Supervisory Decision-Making, and Structured Response ... Candidates (COMMAND Method Series)
by L.K. Duncan
- Price$18.62
- Rating4.9
- Reviews15
-
Police Officer Oral Board Workbook: The COMMAND Method: Interview Preparation, Scenario-Based Questions, Sample Answers, and Strategies for Law Enforcement Applicants (COMMAND Method Series)
by L.K. Duncan
- Price$18.45
- Rating4.6
- Reviews15
-
Police Academy Survival Guide: Prepare for Day One, Survive the Academy, and Graduate Ready for the Street (COMMAND Method Series)
by L.K. Duncan
- Price$16.99
- Rating4.8
- Reviews15
-
Police Supervision: The Complete Guide for Police Sergeants, First-Line Supervisors, and Promotional Exam Preparation (COMMAND Method Series)
by L.K. Duncan
- Price$49.99
- Rating4.8
- Reviews17
-
Police Lieutenant Oral Board Workbook: The COMMAND Method: Scenario-Based Interview Preparation, Organizational Leadership, and Command ... Candidates (COMMAND Method Series)
by L.K. Duncan
- Price$19.52
- Rating4.7
- Reviews15
-
POLICE SUPERVISION: The Complete Guide for Police Sergeants, First-Line Supervisors, and Promotional Exam Preparation (COMMAND Method Series)
by L.K. Duncan
- Price$12.99
- Rating4.8
- Reviews17
-
Police Sergeant Promotional Exam Study Guide: The Seven-Stage System: A Practical System for Mastering the Written Exam and Preparing for Promotion (COMMAND Method Series)
by L.K. Duncan
- Price$9.99
- Rating4.5
- Reviews13
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.