The Tides of Madness - Terror Europae, #1

How far would you go to protect your village from an incomprehensible cosmic horror? Antonio's hand trembled as he reached for the glowing Phoenician artifact, aware that using it might save his people but cost him everything. In the picturesque fishing village of Pedregalejo, Antonio Romero's simple life is shattered when he pulls a bizarre, unnatural creature from the Mediterranean depths. As strange occurrences plague the village and an charismatic newcomer gains influence over the locals, Antonio is drawn into an ancient mystery involving Phoenician ruins, a secret cult, and an awakening cosmic entity.
Aided by a skeptical marine biologist and a priest guarding terrible secrets, Antonio must confront horrors beyond human comprehension to save his daughter and his home. But as the boundary between reality and cosmic nightmare blurs, Antonio realizes that the price of salvation may be his very sanity. The Tides of Madness is a chilling cosmic horror novel for adult readers, blending Lovecraftian terrors with the sun-drenched atmosphere of the Spanish coast.
It is the first book in the Terror Europae series of Cthulhu Mythos stories set in Europe.