I cant make a decision.

I got this gift card worth £ 10 to use in a bookshop.

which book should i buy?

1. Manga - each worth about £7..yet i dont know which manga to buy

2. The book thief - i read it before but it was such a good book that i borrowed from one of my teachers - £ 7.50

3. The Host by Stephenie Meyer - £ 11. Just have to pay one more pound in cash. But if i dont like that book it'll be a waste

4. Comics by Marvel - didnt check the price..not sure which one either..x-men maybe?
aaaaah.
Hopefully time would tell.