Books
The Books
Five books covering the quantitative skills that business professionals use most. Each stands on its own. Every book is available to read online at no cost. Print and digital editions are available through Amazon.

Margin of Error
Statistics for a World That Needs Better Decisions
Statistics taught the way it should be: as a mode of reasoning, not a collection of formulas. This book starts with the question every analyst faces (how much should I trust this number?) and builds from there. It covers descriptive statistics, probability, sampling distributions, confidence intervals, hypothesis testing, regression, and ANOVA, all with real business data and plain language. No calculus required.

Run the Numbers
Data Analysis with R and the Tidyverse
A practical introduction to data analysis in R, built around the Tidyverse ecosystem. It covers data import, cleaning, transformation, visualization with ggplot2, and reproducible reporting with Quarto. The book includes live code cells you can run directly in the browser. It assumes no prior programming experience.

Good Data Starts Here
Survey Design for Business Professionals
Most bad analysis starts with bad data, and most bad data starts with a bad survey. This book covers the decisions that determine whether survey data is usable: how to write questions that measure what you intend, how to structure response scales, how to sample, and how to pilot. Written for practitioners and students who need to collect primary data.

Evidence First
Business Research Methods from Problem to Report
The complete research process, from formulating a question to writing up findings. This book covers research design, literature reviews, measurement, sampling, qualitative and quantitative methods, ethics, and reporting. Written for graduate students and working analysts who need to design studies that hold up to scrutiny.

Make It Visible
Visual Analytics and Data Storytelling
Analysis is only useful if someone understands it. This book covers data visualization from first principles: perception, design, interactivity, geographic mapping, dashboards, and the ethical responsibilities of anyone who shows data to an audience. It uses R and ggplot2 for static graphics and introduces tools for interactive and web-based visualization.
All Five Books
All Five Books
$89
Get PDF and EPUB editions of all five books. Every book is also available to read online for free.