Since you are asking for specifically for ETL books only, I assume you have explored Tulika, Pratham, NBT etc books. If not, you may want to take a look before investing huge sum. Other books may not have great marketing budget, but content is better at many places.
Also, you may want to join a library instead of investing so much now and later thinking of disposing it.
Hi mam cn u help wid des books n where to buy
Cn u help me frm wer to buy
Hi Vidhi ... if you are still interested in buying .. pls contact me at 9810008835 ... I have the whole set of Sep 2014 edition.