Which book should I be reading to learn everything about Eliyahu hanavi's teachings? I have Shai Lamoreh, but right now need more depth into his teachings, with extended explanations.
You could start with this artscroll book: Eliyahu Hanavi: The prophet through the prism of Tanach, Talmud and Midrash by R Avraham Yom Tov Rotenberg which artscroll describes as
Who was Eliyahu? How can we understand his zealotry? What was his mission? How was he unique? What is his legacy for us? The Sages in the Talmud and Midrashim, the commentators on Tanach, and the classic Torah works are filled with descriptions and discussions about Eliyahu.
In this magnificent volume Avrohom Yom Tov (Abie) Rotenberg scours the classic literature to bring us an unprecedented picture of Eliyahu and his mission. Rabbi Rotenberg cites the verses in Tanach and explains them. And he delves deeper and broadens the portrait based on the major commentators.