@MerlinsButler all are good and it depends what you are looking for.
Made in India - meat, fish, vegetarian. All Indian. Fantastic all-arounder. I would recommend this to someone who loves Indian food and does eat meat (though there is still a lot for veggies in this book, it wouldn't be my first recommendation for them).
Fresh India - all vegetarian. All Indian. This is the one I use the least, but am not vegetarian myself, I think I would choose this above Made in India if I was. That being said it is excellent and I have gotten on well with the recipes here, I think it has a lighter, vibrant, fresher feel. If you are a vegetarian looking for Indian specifically, this is the one.
East - all vegetarian. Pan-Asian. Idea is not to create authentic dishes, but takes inspiration from across the whole Asian continent and creates really tasty dishes. I adore this book, all the recipes I have tried have been great. I would recommend this above Fresh India, unless you only wanted Indian in which case there might be a lot here not for you.
I think on Amazons website most books you can look at the first 20 pages for free, you could look at the contents of each and decide based on which feels best to you.