
The Creeping is a 2015 young adult suspense thriller and the debut novel of Alexandra Sirowy. It was released on August 18, 2015 through Simon & Schuster Books for Young Readers in hardback and e-book formats.

The Dead House is a 2015 young adult novel and the debut novel of Dawn Kurtagich. The book was published in paperback in the United Kingdom on 6 August and 15 September 2015 by Orion Publishing and in hardcover in the United States on 15 September 2015 by Little, Brown Books for Young Readers. It is told through a mixture of medias such as diary entries, news clippings, video footage, and various interviews.

The Devourers is a 2015 debut novel by Indian writer, artist, and editor Indra Das. It takes place in Kolkata, India, where Das grew up, and is considered South Asian speculative fiction and dark fantasy, incorporating aspects of historical fiction, fantasy, and horror. It was originally published by Penguin India in 2015, followed by release in North America by Ballantine Del Rey of Penguin Random House in July 2016.

Did You Ever Have a Family is the debut novel by American literary agent and author Bill Clegg, published in 2015.

Dietland is the debut novel by Sarai Walker that was first published on May 26, 2015 by Houghton Mifflin Harcourt. The novel explores the beauty industry and society's obsession with weight loss. A television adaptation of the novel by Marti Noxon premiered on June 4, 2018, on AMC; Joy Nash plays the role of the lead character, Plum.

Eileen is a 2015 novel by Ottessa Moshfegh, published by Penguin Press. It is Moshfegh's first novel.

Everyone Has a Story is an inspirational romance novel written by Savi Sharma. This was the author's debut novel and was first published in August 2015. Sharma self-published her book, which quickly became popular and bestselling. Later it was published by Westland publishers. By February 2017 more than 100,000 copies of the book were sold.

Everything, Everything is the debut young adult novel by Jamaican-American author Nicola Yoon, first published by Delacorte Books for Young Readers in 2015. The novel centers around 18-year-old Madeline Whittier, who is being treated for severe combined immunodeficiency (SCID), also known as "bubble baby disease". Due to this, Madeline is kept inside her house in Los Angeles, where she lives with her mother, a doctor.

Finders, Keepers is a novel by Sapan Saxena. The story takes place across the Indian subcontinent starting from the holy town of Allahabad. It visits several holy sites in India. The story takes place in various places of spiritual importance in India. The novel deals with mythological themes, with a conflict between a newly active historical sect worshipping Shiva and a powerful secret organization, the Nine Unknown Men.

hive | Propolis is a science fiction and dystopian novel by Daniel D.W. and the first volume of The Hive Transmedia Project. The book was published by Mythos Media and HiveTech Media on May 10, 2015. The book contains decipherable easter eggs as well as scannable QR codes for music, animation, videos and a transmedia storyline.

How to Walk Away is a 2015 novel and the debut novel of Australian novelist Lisa Birman. The work was first published on 1 February 2015 in the United States by Spuyten Duyvil Press. The novel centers on veteran Otis and his wife Cat, a genealogist. How to Walk Away is an exploration of post-traumatic stress disorder, obsessive compulsion, body integrity disorder, and the grief of keeping secrets born in war.

Kitchens of the Great Midwest is the debut novel of American author and producer J. Ryan Stradal, published in July 2015 by Viking Press. It debuted at No. 19 on The New York Times Best Seller list for August 23, 2015.

The Library at Mount Char is a contemporary fantasy/horror novel written by Scott Hawkins. It is his first novel.

List of the Lost is a novel written by Morrissey, released on 24 September 2015. The book represents his first non-lyrical fiction publication. It is written in the stream of consciousness narrative style similar to works of James Joyce, Gertrude Stein and Jack Kerouac.

The Mystery of the Clockwork Sparrow is the debut novel of British children's author Katherine Woodfine, initially published by Egmont Publishing in June 2015. The novel is the first book in The Sinclair's Mysteries, a quartet of mystery-adventure novels set in Edwardian England.The Mystery of the Clockwork Sparrow was Waterstones Children's Book of the Month in June 2015. The novel was inspired by Katherine's love of classic children's adventure stories, E. Nesbit, Frances Hodgson Burnett, Enid Blyton and Nancy Drew.

Planetfall is a 2015 science fiction novel by British writer Emma Newman. It was first published in the United States as a paperback original in November 2015 by Roc Books, and in the United Kingdom by Gollancz in paperback in February 2018. An audio edition of the book, narrated by Newman, was published in the United States by Blackstone Audio in November 2015, and in the United Kingdom by Orion Publishing in December 2017.

Season of Crimson Blossoms is an adult fiction debut novel by Nigerian writer and journalist Abubakar Adam Ibrahim. The novel, set largely in the outskirts of Abuja, Nigeria, depicts an unusual salacious affair between the 55-year old widow Hajiya Binta and the 26-year old drug dealer and local gang leader Reza.

Secrets of The Last Nazi is the debut novel by non-fiction writer Iain King. It became the United Kingdom’s best-selling spy story of 2015, and was classified in the United States as a ‘Number One New Release’ in espionage.

Signal to Noise is the debut novel by Canadian-Mexican author Silvia Moreno-Garcia. The novel was published by Solaris Books in February 2015. Moreno-Garcia stated that she was inspired to write the novel based on her parents, who both worked at a radio station.

Simon vs. the Homo Sapiens Agenda is a 2015 young adult novel and the debut book by American author Becky Albertalli. The coming-of-age story focuses on its titular protagonist Simon Spier, a closeted gay high-school aged boy who is forced to come out after a blackmailer discovers Simon's e-mails written to another closeted classmate with whom he has fallen in love.

The Sorcerer of the Wildeeps is a 2015 LGBT science fantasy novella, the debut novella by Kai Ashante Wilson. It is set in the same fictional universe as his later novella A Taste of Honey, as well as several of his short stories. It won the 2016 Crawford Award.

The Sympathizer is the 2015 debut novel by Vietnamese American professor Viet Thanh Nguyen. It is a best-selling novel and recipient of the 2016 Pulitzer Prize for Fiction. Its reviews have generally recognized its excellence, and it was named a New York Times Editor's Choice.

Dörte Hansen is a German linguist, journalist and writer.

The Traitor Baru Cormorant is a 2015 hard fantasy novel by Seth Dickinson, and his debut novel. It is based on a short story Dickinson wrote in 2011 for Beneath Ceaseless Skies called "The Traitor Baru Cormorant, Her Field-General, and Their Wounds".

The Turner House is a 2015 debut novel by Angela Flournoy. The novel was shortlisted for the National Book Award for Fiction and later won the VCU First Novelist Award.

Weightless, released in Germany as Die Neue, is a 2015 young adult novel and the debut work of the American author Sarah Bannan. It was first published in the United Kingdom through Bloomsbury Circus on 12 March 2015, followed by a United States release on 30 June through St. Martin's Griffin. The work deals with the themes of cyberbullying and peer pressure and is told from the viewpoint of several anonymous narrators as they reflect upon the appearance of a new student that stirs up differing emotions from various people.

Welcome to Night Vale is a 2015 novel based on the popular Welcome to Night Vale podcast created by Joseph Fink and Jeffrey Cranor, who also wrote the book. The book was first released on October 20, 2015, through Harper Perennial in the United States and Orbit Books in the United Kingdom.

Zuleikha is a debut novel written in 2015 by the Russian author Guzel Yakhina. It describes the lives of various people, including the titular protagonist, struggling to survive in exile in Siberia from 1930 to 1946.