• Mockito Made Clear
• Help Your Boss Help You, also on Amazon
• Kotlin Cookbook
• Modern Java Recipes
• Gradle Recipes for Android
• Making Java Groovy

FYI, my last name is pronounced as though it was spelled "cousin," like the relative. Go figure.

My one-person company is Kousen IT, Inc.. I say "Kousen Eye-Tee", but my wife calls it "Kousen IT" like it was from the Addams Family

• Tales from the jar side: Yet another cute animal, Anthropic's blizzard of releases, Gemini failure, Chess Mates, and the usual social posts
• Tales from the jar side: Making Java Groovy, Footnote humor, the Iceberg Index, and the usual Social Media silliness
• Tales from the jar side: Another cute animal, MockHub and OAuth, Gemma 4, Lyria 3, and the usual Social Media posts
• Tales from the jar side: Otter reading Kotlin, MockHub and Agentic Commerce, Developing with AI, and the usual Social Media posts
• Tales from the jar side: Another cute animal, Simon Willison on AI coding, my MockHub app, my Chuck Norris story, and social media stuff

• I Finally Understand What MCP Is For
• Sure, I’ll sign your ebook
• Waiting for Spring AI Streaming Responses in JUnit Tests
• AI vs Cthulhu: How to Bypass Guardrails
• Perplexity AI API: Real-Time Search and AI Summation

• You can always find out what I'm doing from my free newsletter, Tales from the jar side
• I also manage the Tales from the jar side YouTube channel
• My blog contains posts from my work using Java, Groovy, Kotlin, and more