Amazing. Absolutely stunning. Hands down the best book I've read in 2015! Six of Crows is a riveting read that was equal parts intriguing plot and development for a rowdy yet loving cast of characters, and that is the exact formula to keep me enthralled for hours. I normally don't like comparisons, but Game of Thrones meets Oceans 11 is 100% accurate. Not only is Six of Crows the perfect ya fantasy caper, the stakes are as high as any in GoT while keeping the humor and fun of the Oceans trilogy. Kaz's rough-and-tumble crew is a group I ship, and I love how perfectly each of the six fits with the group as a whole or in different combinations. Leigh does an amazing job pulling you into the story, and there are more than a few surprising twists and turns that will have you fearing for Kaz & crew and demanding the sequel asap. Speaking of, hey, Bardugo, I'm going to need that like yesterday because WHAT HAVE YOU DONE?! 
 Fans of the Grisha trilogy won't be disappointed, but Six of Crows IS independent enough from Alina's story that new readers won't find themselves missing anything, although I do recommend reading Grisha first if nothing than to tide yourself over until September. My recommendation is that you preorder this book asap and beg, borrow, or steal* a copy in the meantime. 
 But only steal it if it's located in a hostile government's uber-secure court and you're trying to make a huge payday/stick it to an old enemy on whom you have sworn revenge because reasons. Otherwise maybe don't actually steal it. ;)