The only options is to be diligent in looking. I know I'm getting bitten by this problem with my challenge. I thought
Doughnut was published this year, but it was first published last year. Foiled for this year's entry. I use Goodreads which usually is right and lists Doughnut as first published in 2013, but it wasn't. I grabbed the paper copy from the library the other day and glanced through the publishing details...lo and behold it says "First published in Great Britain in 2012". I trust Goodreads and Wikipedia combined to give me the details, but sometimes it just isn't true. Wikipedia also says 2013.
I find wikipedia usually gives me the low down on an author and at least has the books in order (usually.) I like
FictFact to keep my next books easy to find as well.