Plot: ★★★ Characters: ★★★★ Readability: ★★★★ My sister is a big fan of Rick Riordan, so every now and again I get the urge to read a few more and understand a little more of her obsession.  I read the original Percy Jackson books years ago, then started the Heroes of Olympus back in 2016,… Read More The Hidden Oracle (Rick Riordan)