published not long ago by Euro Books India
It's amazing how time trots along so swiftly these days - it's actually been thirteen years since these books were released!
As to what happened to them, well, I fear that they just went out out of print, probably down to lack of sales, or to allow the publisher to move onto something else.
Depending on where you read, Euro Books India was either a local company, or an imprint of Egmont used for the Indian market.
Having worked in the publishing industry, my experience is that the business end of such ventures is very very complicated, and the names that appear on books, and the companies that produce them, and who owns what can be like navigating a labyrinth, so in some ways both may be true - for example a parent company of Egmont (if there is one) might already own, or have bought an existing publisher in India, and then license the books from one of its branches to another.
At the end of the day, it may not be worth trying to untangle the threads, as it doesn't really make much difference - the books became unavailable not too long after they first appeared, and are only available second-hand these days as far as I know.
It's frustrating that they were so difficult to source internationally, and apparently quite hard to find in India, but I think it just indicates that there were not too many of them printed (or if there were lots of them, that they sold out quickly, and people like to hang onto them).
I remain hopeful that they will be made available more widely and readily at some point in the future, but cannot say where or when! Until then, I'll just keep waiting! :-)