I would have to add 2 of the books that got me started in the Reformed path,
"What is Reformed Theology" by RC Sproul (formerly when I bought is Grace Unknown), & "Desiring God" by John Piper. I would have both "Desiring God" & "Pleasures of God".
Good for beginners.

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Frank O Fuentes
Church of THE King
McAllen, Texas
Student at Edinburg Theological Seminary