If you want a flimsy plot and an awful lot of virtue signalling, you'll love this book. Oh, and it has magpies. Lots of magpies.
‘Ninth House’ is a soft magic system masquerading as a hard magic system. Mix into that a protagonist who's inconsistent, a lack of world-building structure and some ridiculous moments, and you've got yourself a frustrating read.
Roger and Dodger are twins. Roger has a way with words, and Dodger a way with numbers. But they have no idea of their real connection - all they know is that one day, from across the world, they start to communicate telepathically. McGuire has created a solid and intriguing fantasy world, a dark but hopeful twist of science and gods and quantum entanglement and powers related to math and words.