David H. Ringstrom, CPA Format: PDF / Digital Print

David Ringstrom’s writing style is technical yet accessible. Because of his background as a CPA, his tips are not just "cool tricks"—they are practical solutions to business problems. He focuses heavily on:

A core theme is preventing errors before they happen. The book covers Data Validation in depth, showing users how to restrict input to specific lists, dates, or number ranges—essential for maintaining clean datasets.