Help me choose ACT Book with so called Real ACT Test questions?

Is this true or just trying to sell more ACT books?

The Official ACT Prep Guide, 2018 prints out in the front ‘The Only Guide to Include Real ACT Tests’ for $23
or is Princeton Review 1,471 ACT book for $12 in good enough?

Please let me know which cheap books helped you. I will purchase Official ACT Prep if I get large CC reply.

Thanks,

Get the official guide.

Just purchased Official ACT Prep. After July 14th, No more test and books. thanks,