KDP categories · Top KDP authors
Da Di: Amazon KDP author data
As of Nov 6, 2026, Da Di has 10 books on Amazon, 9 of them on a best-seller list in the last 30 days (best rank #24), mostly in Electrical & Electronics, Engineering, Electrical.
| Median price | $0.99 |
|---|---|
| Price range (middle 50%) | $0.99 – $9.99 |
| Median reviews | - |
| Total reviews | 0 |
| New books (30 days) | 9 |
| Breakout books (30 days) | 8 |
What stands out
- 90% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $0.99, 90% below the median of their main category, Electrical & Electronics.
- 9 new books in the last 30 days, 8 of them broke into a Best Sellers list.
Da Di's best-ranked books
-
Electrical Exam Simulator 2027-2028: Complete 2026-2029 NEC Code Practice Tests: 1,200+ Journeyman & Master Licensing Drills, Step-by-Step Math Solutions ... License Exam Preparation Series Book 4)
by Da Di
- Price$0.99
- Reviews-
-
NEC 2026-2029 Code Book Fast Navigation & Keyword Index Guide: 2027-2028 Edition: Fast Finder Tabs Blueprint, Rapid 60-Second Lookups & 1,200+ Code Navigation ... License Exam Preparation Series 5)
by Da Di
- Price$0.99
- Reviews-
-
Master Electrician Exam Prep 2026-2027: The Complete 2026 NEC Study Guide with Full-Length Practice Exams and Step-by-Step Code Calculations (National ... License Exam Preparation Series Book 3)
by Da Di
- Price$0.99
- Reviews-
-
EPA 608 Study Guide 2026-2027: Universal Certification Prep: 1,000+ Practice Questions for Core, Type I, II & III Exams | HVAC/R Exam Prep (national hvac r qualification series Book 1)
by Da Di
- Price$0.99
- Reviews-
-
Journeyman Electrician Exam Prep 2026-2027: NEC 2026 Study Guide: 1,000+ Real Printed Practice Questions, Load Calculations, Conduit Fill & Master Ampacity ... License Exam Preparation Series Book 1)
by Da Di
- Price$0.99
- Reviews-
-
Electrical Calculations & Formulas Workbook (NEC 2026): Step-by-Step Math Solutions for Journeyman & Master Exams: 1,000+ Practice Problems, Voltage Drop, ... License Exam Preparation Series 2)
by Da Di
- Price$0.99
- Reviews-
-
Counting Money Workbook for Kids: Coin & Bill Practice, Dollars & Cents, Shopping, Money Word Problems, Comparing Amounts & Making Change
by Da Di
- Price$9.99
- Reviews-
-
Journeyman Electrician Exam Prep 2026-2027: Complete NEC 2026 Study Guide: 1,000+ Real Printed Practice Questions, Load Calculations, Conduit Fill & ... Electrician License Exam Preparation Series)
by Da Di
- Price$19.99
- Reviews-
-
ASVAB Math & Arithmetic Reasoning Workbook 2027-2028: 1,000+ Practice Problems with Step-by-Step Solutions: Arithmetic Reasoning & Mathematics Knowledge ... Enlistment Exam Preparation Series 2)
by Da Di
- Price$0
- Reviews-
- Published2026-10
-
Master Electrician Exam Prep 2026-2027: The Complete 2026 NEC Study Guide with Full-Length Practice Exams, Step-by-Step Code Calculations, Detailed ... Electrician License Exam Preparation Series)
by Da Di
- Price$24.99
- Reviews-
Main categories
FAQ
How many books does Da Di have on Amazon?
KDPTop tracks 10 of their books; 9 made an Amazon list in the last 30 days.
Which categories does Da Di publish in?
Their books chart most often in Electrical & Electronics, Engineering, Electrical.
How does Da Di price their books?
The median price is $0.99; half of the books cost $0.99–$9.99.
Has Da Di released new books recently?
9 new books in the last 30 days, 8 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.