Sinay has authored several books, including Después de las 09:53 (2024), Camino al Este (2019), Cuba Stone (co-authored, 2016), The Murders of Moisés Ville (Restless Books, 2022), and Sangre joven (2009), which won the Rodolfo Walsh Prize at the Black Week of Gijón, Spain. He co-authored ¡Extra!, an anthology of 150 years of Argentinian police chronicles, and in 2021 revived a nearly century-old Yiddish book on Jewish-Argentine journalism through La caja de letras. In 2015, he received the Gabriel García Márquez Award from the Gabo Foundation for the story “Rápido. Furioso. Muerto,” published in Rolling Stone Argentina, where he also served as editor. His work has appeared in prominent outlets such as La Nación, Clarín, and REDACCION.com.ar, and he has contributed to narrative journalism magazines across Latin America, Mexico, Switzerland, and Taiwan. Additionally, he writes a weekly newsletter, Sie7e Párrafos, on books and pop culture, and leads non-fiction creative writing workshops in the U.S., Spain, and Latin America.