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Welcome to my website!

The site includes my biography; information about my books; and reviews from accredited agencies such as Kirkus, Foreword Reviews, and BlueInk Reviews. My books are available for purchase in most online bookstores worldwide. If you are interested in wholesale, you can reach out to an Ingram representative or email me directly at

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My first novel, available on March 2, 2024

Introducing "The Fragility of Light" Heather S. Lonczak's debut novel—a poignant exploration of mental health, resilience, and the enduring power of familial bonds. Sunny Zielinski's journey from a promising young woman to grappling with psychosis is a gripping tale that sheds light on the complexities of mental illness. Lonczak's background as a research psychologist brings authenticity to the narrative, making it a compelling and insightful read.



Retailers and libraries can procure the book through INGRAM ipage or IngramSpark.

Hardcover: 979-8-9896481-0-8, Paperback: 978-1-7353625-9-5, eBook: 979-8-9896481-1-5

NetGalley average rating: 4.5

Goodreads average rating: 4.18

A searing portrait of mental illness and a family trying to stay together.
... the story delivers a sharply written and startling account of a woman and a family put to the test by mental illness—and how they learn to cope and become resilient... readers will find it impossible to put down.”
Verdict: GET IT
— Kirkus Reviews

The Fragility of Light is a moving and thought-provoking exploration of mental illness, grief, and the resilience of the human spirit. Its honest and sensitive portrayal of these complex issues makes it a valuable read for those seeking to understand the nuances of mental health and the power of human empathy in the face of adversity.

... Lonczak’s portrayal of Sunny’s journey through mental illness is both heart-wrenching and insightful. The book delves deeply into the emotional turmoil and psychological challenges Sunny faces. The depiction of her battle with psychosis and her efforts toward recovery offers readers a window into the often misunderstood world of mental health disorders. This aspect of the book is particularly enlightening, shedding light on the reality of living with such conditions and the impact they have on individuals and their loved ones.”  * * * * *
— Literary Titan

This is a wonderful book that should be read by anyone who has a mental illness and people who need to support someone who does.  * * * * *
— Christina, Goodreads reviewer

This is one of those books that grabs you right at the start and does not let go until the end… Following Sunny and her loved ones through this journey ripped my heart apart and stitched it back together.”  * * * * *
— Rachel Kline, Goodreads reviewer

Through different points of view, the reader learns about the pervasive and debilitating impact severe mental illness has on patients, family and friends alike. As a licensed clinical social worker, I found Sunny’s experiences realistic to what I have seen in a clinical setting.”  * * * * *
— Megan, Goodreads reviewer

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