Books by Gavin Somers
Two practical books on getting the numbers right, for people and for AI.
Your AI Is Guessing is for the head of data asked to put AI on the company's numbers: make sure every figure an assistant uses has an owner, a record and a test. Your Numbers Don't Match is for the leaders who feel the cost when dashboards, finance packs and spreadsheets disagree.
The books
New book
Semantic layers and the head of data’s real job
AI assistants rarely get numbers wrong because the data is bad or the model is weak. They get them wrong because the rules were never written down. This book shows how to make sure every figure an assistant uses has an owner, a record and a test.
For: Heads of data, VPs of data and CDOs, and the analytics engineers who build with them
Available now
The Reporting Trust field guide for leaders
Why dashboards, finance packs and spreadsheets disagree, what that Data Tax costs in slower decisions, and what to fix before you scale reporting, automation or AI.
For: Founders, CEOs, CFOs, operators and senior reporting owners
Both books · save £6
Your AI Is Guessing for the head of data, and Your Numbers Don't Match for the leadership team you need on side. Bought separately they are £28.
£28 £22 Save £6 · Both books in PDF and HTML
Latest writing
A practitioner view of how Data Engineering, Analytics Engineering, BI, Analysis, Architecture and Governance overlap across the data work stack.
Why dashboards and spreadsheets show different numbers, and what leaders should inspect before rebuilding reports.
A practical diagnostic checklist for leaders when dashboards, spreadsheets, and finance packs show different numbers.
Free cheat sheet pack
Both books on one page each: Your AI Is Guessing for the data leader, and Reporting Trust for the leadership team.
