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Jason Segel Books In Order

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Publication Order of Last Reality Books

with Kirsten Miller

Publication Order of Nightmares! Books

with Kirsten Miller
Nightmares! (2014)Description / Buy at Amazon
Nightmares! The Sleepwalker Tonic (2015)Description / Buy at Amazon
Nightmares! the Lost Lullaby (2016)Description / Buy at Amazon

Publication Order of Non-Fiction Books

Everything You Need to Know about Nightmares! And How to Defeat Them (With: Karl Kwasny,Kirsten Miller) (2017)Description / Buy at Amazon

About Jason Segel

Jason Segel, a celebrated American actor, is widely recognized for his portrayal of Marshall Eriksen in the popular CBS sitcom How I Met Your Mother from 2005 to 2014. He first collaborated with Judd Apatow on TV series like Freaks and Geeks (1999–2000) and Undeclared (2001–2002) before starring in and writing successful comedy films.

Segel’s filmography includes a mix of comedies like Knocked Up (2007) and dramas such as The End of the Tour (2015), showcasing his versatility as an actor and writer. Notable for his ability to create captivating characters and engaging narratives, Segel co-created and starred in the Apple TV+ series Shrinking in 2023, earning a Primetime Emmy Award nomination for his role as a therapist.

With a talent for storytelling, Jason Segel impresses audiences with his compelling narratives and dynamic character development across diverse genres. Through his performances and writing, he delivers entertaining stories that highlight his skill in crafting memorable protagonists and captivating plots.

Early and Personal Life

Jason Segel was born on January 18, 1980, in Santa Monica, California, and grew up with his older brother, Adam, and younger sister, Alison, in the Pacific Palisades neighborhood. Raised in a household blending Jewish and other cultural influences, Segel attended Hebrew school, had a Bar Mitzvah ceremony, and also went to a private Episcopal school.

At Harvard-Westlake School, Segel’s notable height of 6 ft 4 in (1.93 m) earned him the nickname ‘Dr. Dunk’ as part of the championship-winning basketball team. His high school years, marked by academic achievement and athletic success, provided a solid foundation for his future endeavors in writing and acting. Inspired by his diverse upbringing and experiences, Segel’s storytelling reflects a blend of cultures and influences, shaping his unique voice as a writer and actor.

Writing Career

Jason Segel, a New York Times bestselling author, has ventured into writing movies and songs for films, often assuming starring roles in these productions. One of his notable writing collaborations includes the Young Adult fiction series ‘Nightmares!’ with Kirsten Miller, comprising three thrilling installments: ‘Nightmares!’ (2014), ‘The Sleepwalker Tonic’ (2015), and ‘The Lost Lullaby’ (2016).

Additionally, Segel co-authored the exciting ‘Last Reality’ series with Kirsten Miller, consisting of three gripping books: ‘Otherworld’ (2017), ‘OtherEarth’ (2018), and ‘OtherLife’ (2019). Beyond fictional works, he also delved into non-fiction writing, co-authoring ‘Everything You Need to Know About Nightmares!’ in 2017 with Kirsten Miller, showcasing his diverse writing skills across genres.


‘Nightmares!’ by Jason Segel, with illustrations by Karl Kwasny, was published on September 9, 2014, by Delacorte Books for Young Readers. The book, a first in a trilogy of the same name, has received recognition through several award nominations, including the Goodreads Choice Award for Best Middle Grade & Children’s in 2014, Texas Bluebonnet Award Nominee in 2017, and others.

Charlie Laird finds himself in a precarious situation when his dad marries a woman he suspects is a witch, forcing him to reside in her forbidding purple mansion where sleep brings only terrifying nightmares. Unaware that his troubles are escalating, Charlie soon discovers that nightmares are seeping into reality, a boundary that should never be breached.

As his darkest fears materialize, Charlie must confront them alone, with the fate of his well-being hanging in the balance unless he can gather the necessary support to overcome the impending danger.

Readers are swept into a captivating narrative as Charlie Laird battles his deepest fears, making for a gripping and suspenseful read with inventive storytelling that keeps you on the edge of your seat.

The Sleepwalker Tonic

‘The Sleepwalker Tonic,’ written by Jason Segel with illustrations by Karl Kwasny, was published on September 8, 2015, by Delacorte Books for Young Readers. Serving as the second installment in the ‘Nightmares!’ trilogy, it further explores the captivating and imaginative world crafted by Segel and Kwasny.

In the world of Charlie Laird, life takes an unexpected turn as he navigates his peculiar existence with a stepmom who operates a herbarium and a mansion housing a portal to the Netherworld. Despite recent peaceful slumber, a sense of unease creeps in as strange occurrences unfold, leading to a mysterious shift in Cypress Creek.

With rumors of zombies and sleepless nights circulating, Charlie braves new eerie challenges in a tale where the unusual becomes the norm once more.

Jason Segel and Karl Kwasny once more skillfully delve deeper into the unique universe of the ‘Nightmares!’ trilogy, crafting another imaginative narrative that keeps you hooked from start to finish, making it a must-read for those seeking an exciting and suspenseful adventure.

The Lost Lullaby

‘The Lost Lullaby,’ written by Jason Segel with illustrations by Karl Kwasny, was published on September 13, 2016, by Delacorte Books for Young Readers, serving as the concluding installment in the ‘Nightmares!’ trilogy. This final book wraps up the imaginative journey crafted by Segel and Kwasny, bringing closure to the captivating series.

Charlie Laird finds himself engulfed in a wave of eerie occurrences, from encountering a mysterious new student at school to experiencing unsettling noises in the night, signaling the return of peculiar nightmares. As his dreams take a twisted turn, Charlie discovers himself trapped in another’s haunting dream realm, filled with strange black sheep and looming threats from the malevolent twins Ick and Ink.

Facing an impending woolly nightmare invasion orchestrated by Ink, Charlie and his friends must confront unfinished business and thwart the twins’ nefarious plans to restore peace to Cypress Creek Elementary and ensure everyone’s dreams remain undisturbed.

With yet more eerie twists and mysterious encounters, Jason Segel and Karl Kwasny skillfully again craft a hauntingly imaginative story that will keep readers eagerly turning the pages.


‘Otherworld,’ written by Jason Segel and Kirsten Miller, was published on October 31, 2017, by Delacorte Books for Young Readers, marking the beginning of the ‘Last Reality’ series. This first installment sets the stage for a captivating journey into a virtual realm crafted by Segel and Miller, promising an immersive and thrilling reading experience.

In ‘Otherworld,’ the company touts an extraordinary and addictive virtual world promising to fulfill every desire; for Simon, the perception of a mere game shatters as he uncovers the transformative truth.

Otherworld unveils a new reality, poised to revolutionize humanity and exceed all expectations in ways unimaginable. Welcome to an unexpected journey in the unpredictable realm of Otherworld.

Book Series In Order » Authors » Jason Segel

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