William Mullan is a photographer who specializes in taking pictures of rare apples from around the world.

The golden Knobbed Russet, the star-shaped api etoile, hard red Black Oxford apple — these are just a few of the varieties that appear in Mullan’s 200-page photo-book, Odd Apples.

Writes Atlas Obscura on how Mullan’s fascination with apples came to be:

Mullan was born in the United States, but grew up in the United Kingdom, where a teenage encounter with an Egremont Russet led to his love of apples. Its spicy, persimmon-like flavor “just blew my mind,” he says. But many of the apples he’s photographed were born in North America, including such romantic cultivars as the Black Oxford and Hidden Rose.

“There’s just this sense of infinity with [apples] that I love,” Mullan says. While he imagines he’ll move on to other subjects in the future, for now, he’s still entranced by apples.

Even better, during his exhibits, he slices the apples open and passes the edibles around for his audience to enjoy.

You can follow Mullan’s work on Instagram.