I thought it was brilliant. Watched it twice now and 2nd time round was even better. I rewind to watch Viillanelle's 'Oops' over her driving mishap and 'Dealt with' re Sebastien. (Trying to be vague.)
Sorry TQ. It was a huge relief to me when the last episode didn't turn into a steamy sex scene. 'That's rude'. 
Re the 2nd series, my son works in Bloomsbury. (The meeting room in the first episode with the croissant was shot in Senate House.) Looked out of his office window yesterday and there was Villanelle walking down the street with ???? Massive spoiler. He's not finished the series yet so couldn't tell him why I was so shocked.
Amazon Kindle have the first Luke Jennings book for £3.99. I started reading, but I think it would spoil it to go on. I don't think anything could top Phoebe Waller-Bridge's script and the mesmeric acting of Sandra Oh and Jodie Comer. Such expressive faces. Have even caught myself trying out the latter's eyebrow tricks in the mirror. 