 Oster was born in Odessa and spent his childhood in Yalta.After three years in the Soviet North Sea Navy, he studied in Moscow at the Maxim Gorky Literature Institute.He is the author of many works for children, such as “A Tale with Details”, “Papamamalogy”, “Parenting Adults”, “Grandma Boa”, “Bad Advice”, “Fortunetelling on Hands, Legs, Ears, Back and Neck”.