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Book 1.The Secret of the Cossack Treasure

In front of you, dear reader, is a real detective story involving your peers - the clever Danko and the athletic Bohdan, the girl Halka with a crazy ostrich named Football, several adult vurkagans, and an unfriendly gang led by Lenka Haydamaka... We are talking, of course, about the Cossack treasure - a barrel of gold coins and a golden Cossack mace. For more than three centuries, this priceless treasure has been searched for, and only nowadays two schoolchildren during their summer holidays accidentally come close to solving the mystery... To find or not to find, to run away or to stay, to live or to die - these are the difficult adult questions that brave schoolchildren face...

Book 2. The Secret of the Snake's Head

The treasure hunters are back! Now the heroes, who have already uncovered the secret of the Cossack treasure, are heading to the picturesque Podillia. There is an ancient princely castle and gloomy labyrinths of underground caves . His enemies called him a robber. And somewhere there, Karmeliuk's companions hid a large diamond of unprecedented beauty. Of course, evil people are hunting for the treasure. They want to take not only the diamond, but also the entire castle. Will our heroes - Danil, Bogdan, Lyonka and their new friends - manage to outrun the thieves and save the castle? Will they be able to solve all the thieves' riddles? What will the crazy ostrich named Football do this time? You will learn about all this in the new adventure detective story by Andriy Kokotiukha."

Book 3.The Secret of the Submarine

They have been looking for and finding treasures all over Ukraine - on the ground and underground. Now it's time for underwater adventures. In the Crimea, at the dark bottom of a mysterious bay, lies the Som, one of the first submarines of the Ukrainian Black Sea Fleet. Almost a hundred years ago, it was sunk by the crew to prevent it from falling to the enemies of the young Ukrainian state.

On board the Som is a real treasure that can reveal many secrets and change the idea of one of the heroic episodes of our history. But what kind of monster guards the entrance to this bay? And who else is hunting for this underwater treasure to take possession of it and destroy the secret? This is what our old friends, tireless treasure hunters from Kyiv, Danylo and Bohdan, their friend Halka from Poltava region and a constant member of the fearless team, a fighting African ostrich named Football, want to find out.

The third part of the popular detective series about the lives of modern treasure-hunting schoolchildren offers even more adventures and unexpected discoveries. It also reminds us that we should love our country.... The new adventure detective story by popular Ukrainian writer Andriy Kokotyukha captures us from the first to the last page.