If you're new to OKRs, or if you want to go deeper with understanding OKRs, here's some further reading suggestions for you:
Doerr, John. Measure What Matters. Portfolio Penguin (2018).
Hellesoe, Natalija and Sonja Mewes. OKRs At The Center: How to use goals to drive ongoing change and create the organization you want. Sense & Respond Press (2020).
Niven, Paul R., Ben Lamorte. Objectives and Key Results: Driving Focus, Alignment, and Engagement with OKRs. Wiley (2016).
Wodtke, Christina. Radical Focus (2nd Edition). Wodtke Consulting (2016).
Gray, Doug. Objectives + Key Results (OKR) Leadership: How to apply Silicon Valley's secret sauce to your career, team or organization. Action Learning Associates (2019).
Grove, Andrew. High Output Management. Vintage (1995).
Hubbard, Douglas W. How to Measure Anything: Finding the Value of "Intangibles" in Business. John Wiley & Sons (2007).
Kelly, Allan. Succeeding with OKRs in Agile: How to create & deliver objectives & key results for teams. Software Strategy Ltd (2021).
Lamorte, Ben. The OKRs Field Book: A Step-by-Step Guide for Objectives and Key Results Coaches. Ben Lamorte (2021).
Montgomery, Dan. Start Less, Finish More: Building Strategic Agility with Objectives and Key Results. Agile Strategies Press (2018).
Castro, Felipe. The Beginner’s Guide to OKR. Free eBook (PDF)
Blogs and Articles
Introductions to OKRs
Set Goals with OKRs — re:Work guide from Google.
An Introduction to the OKR framework, by Ian Harvey at Outcomes Thinking.
Getting Started with OKRs, by Christina Wodtke on Elegant Hack.
Plans that Work: Strategy Execution Through OKRs, by Betterworks.
How to Connect Strategy with OKRs, by Nacho Bassino on Mind The Product
Applying OKRs, by Daniel Terhorst-North at Dan North Associates.
Using OKRs to Increase Organizational Learning, by Christina Wodtke on Elegant Hack (a draft chapter from the second edition of Wodtke's book Radical Focus).
OKRs From a Beyond Budgeting Perspective, by Bjarte Bogsnes on Agile Alliance.
Cascading OKRs at Scale, by Christina Wodtke on Elegant Hack.
Creating an OKR Template, by Betterworks.
Experiences with OKRs
I’ve failed at OKRs. You?, by Paul Bellows, President at Yellow Pencil.
7 Lessons Learned in Embracing OKRs, by Paul McDonnell, VP, Marketing at Insight Partners.
Objectives and Key Results: Continuously improve on using the OKR method, by Anne Weise at Thoughtworks.
15 OKR experts explain why companies fail first-time implementation, by Tima Bouqdour on Just 3 Things
18 experts explain common OKR mistakes in 2022, by Kim Atherton on Just 3 Things.
The Dark Side Of OKRs (And Why We Should Care), by Antoinette Weibel and Meike Wiemann on Corporate Rebels