Even though I have the galley, I went and put Into the Still Blue on hold, figuring I might want to read Brooke first, based on publish order. 
 Eh. It wasn't all that necessary. Most of this short was about Brooke getting over Perry, and debating the hotness of two different guys. Not that I have complaints about reading anything from Rossi because she has a way with words that is always a pleasure to read, but I am sort of burned out on series with all of the extra short stories which don't actually need to be read. 
 There were a few snippets about the other characters, but it was nothing all that new or exciting. 
 If you're debating whether or not to read Brooke, but haven't yet read Roar and Liv, definitely go for R&L instead. At least that was a short story worth including, and is one you won't want to miss if you're invested in the series. 
 (I still adore this series though)