The font is Adobe Caslon Pro, a fine choice hampered here by a too-large line-height and a font size too small for that line width.
Combined, those metrics maroon each word in a sea of white space that confuses the moving eye and impedes comprehension.
Typography is an art that cannot be precisely defined, a taste that seeks clarity to liberate meaning.
Your multi-columns reduce white space to better guide the eye (good), but would likely tire for longer works (bad).