help?

I want to do a new reading challenge this year. something along the lines of....

 

reading a book from a series that cant be read on its own, for the complex story will otherwise be lost.
reading the series as a whole. big series, chunky books

 

A series that is intimidating, for its size or complexity.

 

 

Now, I'm alright at setting myself a challenge, but not always great at the finer details. if you know of any Challenge's that sounds similar to this ^^ would you be able to point me in that direction??