"Martins has fun meticulously unpeeling the onion layers of Pip’s mind and showing how truth and trust can be malleable concepts. Opposite World reads rather like a course of psychotherapy with SF trappings, its narrative given impetus not so much by storytelling drive but by the protagonist’s desire, relatable and common to many, to understand herself better and heal the mental and emotional fissures left by her past."

– Financial Times

"This is a gripping, inventive and very human tech thriller."

– SFX Magazine

“An articulate near-future Black Mirror-style take on loss and memory in a high thriller package."

– Concatenation

"This is a story of trust, and a brilliant, unique journey into the vulnerabilities and insecurities of the self."

– British Fantasy Society

“Imaginative, sophisticated, and full of suspense.”

– Dr. Alice Violett, historian & book critic

“Thought-provoking…perfect for fans of mind-bending sci-fi like Inception.”

– Readworthy on BookBub

"Opposite World opens as a mysterious coming-of-age story but charts off-course to explore states of the human mind. The real and the virtual blend into an inescapable, claustrophobic nightmare. This story proffers a cautionary tale about the lures and dangers of the surreal world, and the level of control over our lives that we relinquish to technology. For fans of cutting-edge psychological terror replete with cultural fears."

– Aurealis