A few years ago, I spent most of my savings on The Lunar Chronicles by Marissa Meyer (Cinder, Scarlet, Cress, Winter, and Stars Above; I didn’t get Fairest), read them all, and loved them…though I didn’t reread them and sold them some time later.
And what was the first series you spent most of your savings on?
Raymond Feist probably in it’s entirety. Though I remember Redwall being the first books I bought a lot of with my pocket money! Still have them all, I’ll be passing them onto my kids if I ever get around to having any!