In reply to Mowglee:
There is nothing in preparation re a new Llanberis guidebook from the Climbers' Club, nor will there be in the foreseeable future... the current guidebook was published in 2009 and was reprinted in 2019...
... the 2019 reprint is identical to the 2009 edition other than it now has card covers rather than the original plastic encapsulated cover(s)...