The 90-Day Leadership Field Manual
Buy the Book
Product Details
Publisher: Elara Holdings Pte. Ltd.
Release Date: September 29, 2026
Formats: Hardcover, Paperback, Ebook, Audiobook
ISBN: HC: 979-8-9965789-3-1; PB: 979-8-9965789-0-0; EB: 979-8-9965789-1-7; AUD: 979-8-9965789-2-4
Trim: 5.5 x 8.5
Page Count: 256
Practical Guidance for First-Time Leaders
Haraya Del Rosario Gust
You got the promotion. Now everyone’s looking to you—but inside, you’re quietly unsure, because no one actually showed you how to do this.
You’re not alone. Most new leaders are dropped into the role with no real training and left to figure it out. The cost is high: exhausted teams, missed opportunities, and good people leaving.
The 90-Day Leadership Field Manual is more than advice. It’s a practical, day-by-day companion that helps you:
clarify ownership so people stop guessing who’s accountable;
build simple meeting rhythms that create calm, not chaos;
give feedback that lands, and handle hard conversations without losing your team;
coach your people to grow and take ownership instead of waiting on you for everything.
A free downloadable companion Field Notebook and an optional daily email help you apply these lessons as you go.
About the Author
Haraya Del Rosario Gust is the founder of the Field Ready Program, a facilitator certification for HR/L&D leaders and executive coaches built on her book, The 90-Day Leadership Field Manual. A first-generation entrepreneur, she built and exited her own company and has trained executive leadership teams across Southeast Asia and the US.
Visit the author’s website at haraya.com
Reviews
“Many leadership books are full of theory. This one is full of what to actually do. Haraya Del Rosario Gust has created something rare: a book that sits beside you and tells you exactly what to focus on today—Day 1, Day 14, Day 45, Day 90. If you’re stepping into leadership for the first time, The 90-Day Leadership Field Manual is the guide I wish existed when I started.” —Gino Wickman, author of How to Be a Great Boss and Traction and creator of EOS®
“The 90-Day Leadership Field Manual is what I hoped I had as we first deployed EOS® in our company. It took us a lot longer than 90 days to build a rhythm. The book is a good handbook to have for all leaders, especially those that just stepped into leadership—or any leader implementing new systems like EOS®.” —Alick Koo, CEO of UCP Group
“The issue of helping managers with the practical side of rolling out practical tools into the business has long existed, and I feel this book truly addresses it head on. It is a simple, practical, and super helpful way of helping managers be better managers. As a natural visionary, I would have found this incredibly helpful myself as a manager in the earlier years of my career.” —Daniel Davies, Expert EOS Implementer® and regional community leader
“Nervous about managing for the first time? Build the confidence that took me 35 years to develop as a leader. I’m two months into leading a new team of five, and this content has already reinforced what I know while teaching me plenty of new ideas.” —Brian Costanzo, vice president, membership and chapter relations, Commercial Real Estate Development Association (CREDA)