ebook bike is a web site where author's books are illegally offered for free. This is known as pirating. This is illegal.
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This site is a legally run site, that violates every author's copyright. People upload whatever ebook they want, but if the author finds their copyrighted work there, they must request to take it down by filling out a form.
This is a website where users are known to illegally upload and share copyright protected works without any active policing in place bar a DMCA button for authors who manage to stumble upon their works onsite and a small notice asking people to not upload works they do not own rights to. Authors have been embroiled with the site owner in disputes which have spilled onto several social media platforms. Use is advised with caution.