One of my favourite books ever is probably Rebecca, by Daphne du Maurier. The plot is interesting and well-unfolded, but my favourite thing about it is probably the style of writing, which is completely beautiful. Another two books I'll never forget are The Night Circus, which again has amazing description and the whole idea is one which I wish was true, and When You Reach Me, which has really interesting ideas about time travel (I must have read that book at least ten times).