Happy Un-Birthday to me....

My sweet Sister in law brought me an unbirthday present with an unbirthday card....she bought me the 4Th book...Breaking Dawn! All's I need now is Eclipse which is the hardest to find unless I want to pay more I guess...but if I want a matching set I will have to buy the first three books? Which I will probably end up doing?! What am I going to do...or read I should say when this saga comes to an end???