The biggest-selling book of 2025 so far has been revealed

You need to add this book to your reading list

2025 has been one of the best years for books, and we're not even halfway through the year yet.

We've been spoiled for choice with the best of fiction and non-fiction this year, but one book has come out on top.

According to the New York Times, Onyx Storm by Rebecca Yarros is the best-selling book of 2025 so far.

Earlier this year, the author released another fantasy novel as part of the Empyrean series.

The novel is a follow-up to the bestselling books Fourth Wing and Iron Flame.

Selling 2.7 million copies in its first week alone, readers couldn't get enough of the novel.

But what is Onyx Storm about?

‘After nearly eighteen months at Basgiath War College, Violet Sorrengail knows there’s no more time for lessons. No more time for uncertainty. Because the battle has truly begun, and with enemies closing in from outside their walls and within their ranks, it’s impossible to know who to trust.

‘Now Violet must journey beyond the failing Aretian wards to seek allies from unfamiliar lands to stand with Navarre. The trip will test every bit of her wit, luck, and strength, but she will do anything to save what she loves – her dragons, her family, her home, and him.

‘Even if it means keeping a secret so big, it could destroy everything.

‘They need an army. They need power. They need magic. And they need the one thing only Violet can find – the truth.

‘But a storm is coming… and not everyone can survive its wrath.’

What has been your favourite book of 2025 so far?

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