Not claiming to be an expert, but I say no. It doesn't look like any of the three Liam signatures I have. Also, the signature looks broken in places with extra marker points (near the start and end of the L) like someone who has little experience writing that name would do.
Cheers guys the person selling said it got signed years ago. But the books only 3 years old. Got me questioning if I wanna buy it or not so thought I’d bring it to the best place!