Now that the Invisible Library series has become firmly established, the storylines are just getting better and better. Thematically, The Lost Plot is more mysterious and adventurous, drawing heavily from Dragon vs. Fae politics, and there are also strong attempts to involve as many world-building elements as possible. That said though, I do feel this installment takes a step away from series arc that has been developing for the last three books; the plot of this one is a lot more “standalone” than the others, which might make it a good jumping on point for new readers, but of course I would still highly recommend starting from the beginning if you can. The Lost Plot once again follows protagonist Irene Winters, an agent of the secret organization known as the Invisible Library whose members are tasked with traveling to alternate worlds to procure rare books (and yes, sometimes that means stealing them). When the book begins, Irene is offered a business proposal by a mysterious stranger. The would-be client, clearly a dragon, wishes to pay handsomely for her services to obtain a rare copy of Journey to the West, one of Chinese literature’s greatest classics. However, because of the Invisible…