Amos was born in Tel Aviv on May 2,1927 to Yaakov and Rachel. He had two brothers. He studied in the New High School of Eretz Israel HaOvedet. He was a member of HaShomer HaTza’ir, but in 1945, he left. He would read all of the wall posters in order to broaden his horizons, from the Hagana’s HaHoma to IZL’s Herut to Lehi’s HaMaas. He was infuriated by the way in which the Hagana blamed Lehi for killing British soldiers. HaMaas influenced him greatly, and the tone and style in it seemed on-point and truthful. Slowly, he was convinced that Lehi’s path was the correct one. He tried to make contact, but when he approached the youths who were putting up posters, they ran away from him. He then expressed his view to an acquaintance who he suspected might be in the underground, and sure enough, a recruiter approached him.
Amos joined Lehi in August 1946. He had preparatory discussions and was sent to Dr. Eldad’s course in ideology. At first, he was involved in recruiting new members. He focused on people on the political left, from HaShomer HaTza’ir and the Palmach — but also fellow students of his — usually by way of a third party.
For the academic year 5707, Amos was enrolled at Hebrew University and moved to Jerusalem. He was assigned to the supporters’ division, but he asked to be transferred to the operations division and was trained in firearms and explosives. He then went straight out on his first mission. He was a fighter and commander in all of Lehi’s battles in Jerusalem, until the Battle of Deir Yassin, in which he was injured and sent to recover in Tel Aviv. Along with other Lehi members, he enlisted at Sheikh Munis. They were then sent to the absorption center, where he was assigned to Battalion 89 of the 8th Brigade. He fought in all of its battles in the War of Independence.
Afterwards, he began working as a journalist, writing the satirical column Uzi VeShut in Haaretz. He established a reputation as a journalist and satirist. From 1954 to 1963, he studied and worked in Paris. In 1962, he married Nurit Graetz (today Professor Graetz-Kenan), and they have two daughters. Amos wrote plays, prose and poetry. Some of his more famous works are The Way to Ein Harod (made into a film), The Rose of Jericho, Et Vahev BeSufa and others.
Amos is also a talented painter and sculptor, and many of works have been exhibited. He established the Open Museum in Tefen in the Galilee.