La La
La La asked M.R. Graham:

So The Books of Lost Knowledge are linked to the Liminality books. I had no clue until I read the synopsis for In the Shadow of the Mountains that there was a character in common with The Medium. Do you recommend readiing the Books of Lost Knowledge, first?

M.R. Graham I'm glad you asked that!
The Books of Lost Knowledge are not a series in the sequential sense. They don't necessarily need to be read in any particular order, though there is a mystery in Shadow of the Mountains that won't be quite as mysterious to anyone who has read the other books first. Lost Knowledge covers all of the books that take place in this same world. They share some characters and a common mythology, but not an overarching plot.
Liminality is a sequential series, starting with The Medium, and it's actually going in a particular direction. Shadow of the Mountains covers some of the events of the end of The Medium, but from a different perspective and including a lot that was happening offstage, as it were. I've had several people tell me that they prefer to have read both to get the whole picture, but it's not necessary.

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