liverock and invertebrates, corals are very delicate and specialized. Im not sure if you can find then in your area

Is keeping a saltwater tank difficult

Everyone whom I met told me that its not easy to keep Salt Water Aquarium. All except on had no experience with the Salt Water Aquarium. but had only tropical fish like me.

The one who had some experience with Salt Water Aquarium. has a very small one and has not got a long experience keeping it. Some times I am confused whether I should start it at all or not!

I will be buying your book may be then I can decide! I am in India and have not come across any shop who keeps Salt water Fish and other stuff.
Today I don't know what is Reef
What is Animals ?
Can I keep all of them together? etc.

I would think very carefully before starting a reef aquarium a couple of important considerations

Reef keeping is *very* expensive, the tank needs purified water and specialized lighting.
Animals e.g. liverock and invertebrates, corals are very delicate and specialized. Im not sure if you can find then in your area
you may have difficulty finding the correct supplies in your area
I have no experience of India.... so I have no idea of the availability of specialized items.

I would suggest further research on your part before jumping into this hobby. Of course I would like you to have my book, but I don't think it would be fair if you don't understand the implications.

I would investigate reef keeping people in your area of the globe and browse my website for more information before you make a discussion

Best Regards
Robert