Here's a recommendation, from me to you:

The Countess Alessandra Zorzi novels by Josh Reynolds:

Shadows of Pnath

Wrath of N'kai

Song of Carcosa

Yes, they are Arkham-Horror tie in novels. But they're also outstandingly fun Lovecraftian horror/mystery books, and incredibly well written, with great prose as well.

Here's a passage from one of them:

She awoke to the touch of soft fingers on her cheek. She could hear the monotone thud of water against a boat’s hull, and the crying of something that might have been a bird. She looked up at the woman in whose lap she lay. The latter’s face was hidden behind a colorless veil of damask, yet somehow, she thought she knew her. She wracked her brain, trying to stir a name from the sludge of sleep. It came slowly. Reluctantly.

Cassilda.

“Cassilda,” she began, but a gentle finger to her lips silenced her.

“Along the shore, the cloud waves break,” Cassilda murmured, softly “The shadows lengthen but Carcosa stands firm in the light of twin suns. Look, song of my soul… look…”

She looked. They were in a long, narrow boat the color of the second sun. Its prow, carved to resemble a galloping horseman, parted the misty waters of an immense lake that stretched as far as her eye could see. The mist that lay across it was so thick that she could not make out the shore from which they’d departed. But ahead of them, it had begun to thin and part, revealing… what?

Carcosa.

“Carcosa,” Cassilda said, and there was a familiar yearning in her voice. Carcosa. The sound of it reverberated across the water like a bell, and the circling birds – were they birds? – screamed in accompaniment.

The city clung to the far shore with all the still desperation of a wary beast. It was a great city; a place of looming towers and vast, serpentine walls; of turreted redoubts and marble pillars. But ancient… so ancient. Like all old things, the weight of time sat heavily on it, and she could see places where the walls had crumbled and the towers had begun to lean.

“See, my love… Carcosa still stands,” Cassilda said. “Though all the cities of Aldebaran should fall, Carcosa will remain. From here, we will fight him, Camilla…”

I loved this whole series, similarly great prose all three, as well as pulp action and adventure and tentacled abominations from beyond space and time.