Special Theory of Relativity and Quantum Theory are considered as the two major revolutions of the 20th century. Roger Penrose wrote “Albert Einstein had such extra-ordinary deep perceptions of the workings of Nature that he laid foundation stones for both of these twentieth century revolutions in the single year of 1905”. The year 1905 was Einstein’s Annus Mirabilis (Year of Miracles) when he was working, in almost total isolation, in the Swiss Patent Office. In this small book, the author - Ajoy Ghatak gives the basic physics and consequences of his revolutionary contributions in his Year of Miracles: E=mc2, The Light Quantum & Special Theory of Relativity.