heena , actually what institute do always update the relevant cases with a remarkable judgments , everytime they issue the recent cases as for may 2011 they issue the case study which already i had attach , the important book is that which got publish in 2009 , actually that book contain all the land mark decisions till that day , now when u study for cases in dt and idt u cant only realy on those 18 pages which instiute issued , so updates till 2009 are in that book and recent updates are those which institute issued , so the whole case study get cover ...however u will find all this cases in the study material even when u study , its a compilation of all the case study
the other are the best cases books till date in market so i attach them even for u r furture studies if any one want ...however if u study the book issued in 2009 and the recent case study issued by institute its more than enough
thanks with regards