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The First 90 Days (Michael Watkins)

Books

The standard playbook for leadership transitions — diagnosing the situation you're inheriting, securing early wins, and building credibility fast. Written for executives entering new roles, it maps remarkably well onto taking over a just-purchased business.

Pricing
One-time — Book — hardcover around $30 retail; widely available in all formats (HBR Press, updated & expanded edition).
Best for
The 90 days between wiring the money and feeling like the actual owner
Last verified
Jul 10, 2026 — pricing and status checked against primary sources
Roadmap stages
8. Close & transition

Pros

  • The canonical transition framework — situational diagnosis (STARS), early wins, stakeholder mapping
  • Directly counters the classic new-owner mistake of changing too much too fast
  • Short enough to read during diligence, before you need it

Cons

  • Written for corporate leadership transitions, not ownership — no SMB specifics like seller handoffs, personal guarantees, or cash controls
  • Frameworks skew big-company; you'll translate to a 15-person business yourself

What searchers say

A perennial business bestseller recommended across acquisition podcasts and communities for the post-close transition; HBR Press's flagship transitions title.

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Verification sources