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MARCUS T CALDER: Amazon KDP author data
As of Nov 6, 2026, MARCUS T CALDER has 7 books on Amazon, 5 of them on a best-seller list in the last 30 days (best rank #7), mostly in AI & Semantics, Software Design, Testing & Engineering, Programming.
| Median price | $9.99 |
|---|---|
| Price range (middle 50%) | $9.50 – $26.50 |
| Median reviews | - |
| Total reviews | 0 |
| New books (30 days) | 5 |
| Breakout books (30 days) | 3 |
What stands out
- 71% of the catalog made a best-seller list in the last 30 days: the whole backlist sells, not one hit.
- Median price $9.99, 23% below the median of their main category, AI & Semantics.
- 5 new books in the last 30 days, 3 of them broke into a Best Sellers list.
MARCUS T CALDER's best-ranked books
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OPENAI CODEX CLI IN PRACTICE: Build, Debug, Test, and Ship Real Software with AI Coding Agents, AGENTS.md, MCP, Skills, and Agentic Workflows
by MARCUS T CALDER
- Price$9.50
- Reviews-
- Published2026-09
-
AGENTIC AI ENGINEERING WITH CLAUDE CODE, MCP, AND CONTEXT ENGINEERING: Build Production-Ready AI Agents, Autonomous Workflows, and Multi-Agent Systems with Tool, Memory, Orchestration, and Automation
by MARCUS T CALDER
- Price$9.99
- Reviews-
-
AGENTIC AI FOR BUSINESS: Build Autonomous AI Agents That Replace 10+ Hours of Work Weekly — No-Code Systems, Real Workflows, and Scalable Automation
by MARCUS T CALDER
- Price$9.50
- Reviews-
- Published2026-09
-
THE AGENT-READY WEB: Design AI-Readable Websites, MCP Tools, WebMCP Interfaces, and Agent Commerce Flows for the Next Era of Online Business
by MARCUS T CALDER
- Price$0
- Reviews-
- Published2026-10
-
OPENAI CODEX CLI IN PRACTICE: Build, Debug, Test, and Ship Real Software with AI Coding Agents, AGENTS.md, MCP, Skills, and Agentic Workflows
by MARCUS T CALDER
- Price$26.50
- Reviews-
-
Agentic AI: How to Build Your First AI Workforce in 7 Days (No Coding Required) and Automate Your Business Without Hiring
by MARCUS T CALDER
- Price$0
- Reviews-
- Published2026-09
-
Industrial Water Treatment Handbook: Boilers, Cooling Towers, and Process Water Systems
by MARCUS T CALDER
- Price$131
- Reviews-
Main categories
FAQ
How many books does MARCUS T CALDER have on Amazon?
KDPTop tracks 7 of their books; 5 made an Amazon list in the last 30 days.
Which categories does MARCUS T CALDER publish in?
Their books chart most often in AI & Semantics, Software Design, Testing & Engineering, Programming.
How does MARCUS T CALDER price their books?
The median price is $9.99; half of the books cost $9.50–$26.50.
Has MARCUS T CALDER released new books recently?
5 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.