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Bertha Zimmer: Amazon KDP author data
As of Nov 6, 2026, Bertha Zimmer has 4 books on Amazon, 2 of them on a best-seller list in the last 30 days (best rank #2), mostly in Cooking by Ingredient, Meat, Poultry & Seafood, Seafood.
| Median price | $8.49 |
|---|---|
| Price range (middle 50%) | $2.99 – $13.99 |
| Median reviews | 126 |
| Total reviews | 506 |
| New books (30 days) | 2 |
| Breakout books (30 days) | 2 |
What stands out
- Median price $8.49, 184% above the median of their main category, Cooking by Ingredient.
Bertha Zimmer's best-ranked books
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The Ultimate Ninja Crispi PRO Air Fryer Cookbook for Beginners: Easy Ninja Crispi Recipes for Crispy Favorites, Quick Family Meals, Flavorful Snacks, Sides, Desserts, and Effortless Everyday Cooking
by Bertha Zimmer
- Price$13.99
- Rating4.7
- Reviews80
- Published2026-09
-
The Ultimate Ninja Crispi PRO Air Fryer Cookbook for Beginners: Easy Ninja Crispi Recipes for Crispy Favorites, Quick Family Meals, Flavorful Snacks, Sides, Desserts, and Effortless Everyday Cooking
by Bertha Zimmer
- Price$2.99
- Rating4.7
- Reviews80
-
Ninja CRISPi Air Fryer Cookbook with Color Pictures: Delicious & Diverse Ninja CRISPi Air Fryer Recipes to Elevate Your Everyday Cooking | Crispy Perfection Made Easy | Perfect for a Busy Life
by Bertha Zimmer
- Price$13.99
- Rating4.4
- Reviews173
- Published2025-01
-
Ninja CRISPi Air Fryer Cookbook with Color Pictures: Delicious & Diverse Ninja CRISPi Air Fryer Recipes to Elevate Your Everyday Cooking | Crispy Perfection Made Easy | Perfect for a Busy Life
by Bertha Zimmer
- Price$2.99
- Rating4.4
- Reviews173
- Published2025-01
Main categories
FAQ
How many books does Bertha Zimmer have on Amazon?
KDPTop tracks 4 of their books; 2 made an Amazon list in the last 30 days.
Which categories does Bertha Zimmer publish in?
Their books chart most often in Cooking by Ingredient, Meat, Poultry & Seafood, Seafood.
How does Bertha Zimmer price their books?
The median price is $8.49; half of the books cost $2.99–$13.99.
Has Bertha Zimmer released new books recently?
2 new books in the last 30 days, 2 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.