Why can't this be, "This is one good book?"
That's also a correct translation.
Why is it not अच्छा किताब? Is it because book is feminine?
Yep! Exactly, book is feminine in Hindi.
oh that's ridiculous
This book is good?
Both literally mean the same.
This is name Harpreet Singh
I learned a lot
Why not achha or achhe?
Why this can be 'this is good book'