Probably somewhere around 3.75 stars. 
 Tiny spoilers: 
 This book was delightful and lovely, but also extremely sad basically the whole way through because you know it's a prequel of sorts and you know the ending. It was very clever and I loved the small (& large) nods to Alice (and Poe) throughout. 
 For a minute there I thought the ending might be different, but that was just wishful thinking on my part.