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Extra Credit: Some lessons aren’t in the syllabus.
When disgraced teacher Sarah Chen takes a job at Millbrook Academy, she’s hoping for redemption, not recognition. But from the moment she steps into the ivy-wrapped halls, it’s clear the school has secrets — and someone is willing to kill to keep them buried.
A missing student. A coded journal. A faculty that looks the other way.
Sarah’s second chance becomes a descent into obsession as she uncovers a network of manipulation and abuse behind Millbrook’s perfect reputation. And when her own past resurfaces, she realizes that at Millbrook, extra credit doesn’t mean working harder — it means surviving the lesson.
Dark, atmospheric, and relentlessly tense, Extra Credit is a psychological thriller where power, privilege, and guilt collide — and where the price of truth is always too high.
A missing student. A coded journal. A faculty that looks the other way.
Sarah’s second chance becomes a descent into obsession as she uncovers a network of manipulation and abuse behind Millbrook’s perfect reputation. And when her own past resurfaces, she realizes that at Millbrook, extra credit doesn’t mean working harder — it means surviving the lesson.
Dark, atmospheric, and relentlessly tense, Extra Credit is a psychological thriller where power, privilege, and guilt collide — and where the price of truth is always too high.
355 pages, Kindle Edition
Published October 21, 2025
About the author
D.L. Hart
9 booksD.L. Hart is like you in many ways. She is fascinated and intrigued by the human condition and how and why things work. Through personal experience, research, observation and reading; certain ideas and beliefs began to crystallize.
D.L. Hart believes that each person has the ability determine the course of their lives by taking control of their beliefs, thoughts, and emotions.
She has written and published 4 books on Amazon Kindle. Her first book is "What is the Secret of Gratitude?-How to Attain an Attitude of Gratitude". She recently published a Childrens book titled "Kittens Discovered". Ms. Hart was not planning on writing a childrens book, but the idea popped into her head and she took inspired action. Her newest book is "Decode Food Labels-What Are You Eating?"
Plans include an additional 7 books that are in progress to include 2-3 more childrens books, 2 to 3 books on food and health and more on improving our lives.
D.L. Hart graduated from Big Ten School with a science degree with area of specialization in microbiology. She has earned a living in Quality Control and Research & Development departments in consumer products, clinical chemistry, and foodindustry and enjoys trouble-shooting and problem solving.
Ms. Hart has a wide array of interests: photography, hiking, gardening, alternative health practices, reading, and her pets. She currently resides in Indianapolis, Indiana.
D.L. Hart believes that each person has the ability determine the course of their lives by taking control of their beliefs, thoughts, and emotions.
She has written and published 4 books on Amazon Kindle. Her first book is "What is the Secret of Gratitude?-How to Attain an Attitude of Gratitude". She recently published a Childrens book titled "Kittens Discovered". Ms. Hart was not planning on writing a childrens book, but the idea popped into her head and she took inspired action. Her newest book is "Decode Food Labels-What Are You Eating?"
Plans include an additional 7 books that are in progress to include 2-3 more childrens books, 2 to 3 books on food and health and more on improving our lives.
D.L. Hart graduated from Big Ten School with a science degree with area of specialization in microbiology. She has earned a living in Quality Control and Research & Development departments in consumer products, clinical chemistry, and foodindustry and enjoys trouble-shooting and problem solving.
Ms. Hart has a wide array of interests: photography, hiking, gardening, alternative health practices, reading, and her pets. She currently resides in Indianapolis, Indiana.
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