The foundational text. Csikszentmihalyi spent decades at the University of Chicago researching what he called “optimal experience” — the conditions under which people report being most fully alive, most productive, most absorbed in what they’re doing. Flow (1990) is the academic-rooted but popular-shaped book that introduced flow theory to a general audience. Sister work: Finding Flow (1997, csikszentmihalyi-finding-flow), which translates flow theory into everyday-life application.
For citation purposes, prefer Flow for the foundational theory (skill-challenge balance, autotelic personality, conditions for flow, growth-of-the-self mechanism). Use Finding Flow for the practical application material that the popular audience consumes.
Pre-extraction work needed before v2.4 batch can pull this:
- Run hygiene pass per
docs/4-CONTENT/wiki-engine/verifiable-knowledge-model/phase-3.5-raw-source-hygiene/RUNBOOK.md. The BookConvert output has clean structure (98 markdown headings, quality_score 1.0 from pymupdf4llm) but the title/cover pages carry OCR-style noise that the prefilter should already drop via MIN_WORDS_PER_SECTION + the skip-list. - Determine
front_matter_pagesoffset (e-book PDF page → printed page 1) by eyeballing<!-- Page N -->markers against the printed page numbers in the raw. - Flip
hygiene_status: not-passed→passedand addhygiene_passed_atonce Phase 3.5 hygiene completes.