"ظلام الرعد" is a free ebook app available for Android users. The app is developed by ZKingdoom and falls under the category of Education & Reference, specifically Books.

The ebook tells the story of a girl who promised herself not to fall in love again, out of fear for the thorny and dark trap that love can be. But when she met him and he broke through the strong walls she had built around her heart, she surrendered to love and its power. The story is full of vivid descriptions and colorful characters that will keep readers engaged from beginning to end.

The app is easy to navigate and the font is clear and readable. The only downside is that the ebook is only available in Arabic. Overall, "ظلام الرعد" is a great choice for fans of romantic novels who are looking for a captivating and well-written story.