The most influential sleep book of the era is also the most-corrected. What survives the fact-checks, what doesn’t, and the one-page toolkit that actually works.

Marti Olsen Laney’s book gave introverts permission to stop apologizing — but its dopamine-versus-acetylcholine brain model overreaches. We check the claims against trait research, solitude studies, and acting-extraverted trials.

Total Immersion got one big thing right — drag reduction beats pulling harder — and oversold the rest. Here is what holds up, what does not, and the toolkit worth keeping.

Eker’s «money blueprint» is a metaphor posing as a mechanism, and the book doubles as a seminar funnel. We keep the two tools that actually work and show the evidence against the rest.

We read the oldest self-help text still in print the way we read any book on the shelf: what does it claim, and what survived 2,500 years of field testing plus modern randomized trials. Verdict: read it — critically.