Dominion by Tom Holland is another good one.

If you’re into philosophy I’d recommend Nihilism by Eugene Rose (who later became an orthodox monk, Fr. Seraphim Rose). It’s incredibly dense (more so than even Nietzsche) and manages to both articulate and dispel Nietzsche’s entire philosophy, with beautiful parallels to Dostoyevsky.

A deep dive into history, including the history of science, or into philosophy will all point you back inevitably to the person and divinity of Christ.

It’s like an orange pill, except it goes infinitely deep and reveals truth at the most fundamental level.