Recently I scanned some of my sketchbooks and assemble it in pdfs :>

First one that I love dearly is my Posca markers adventure! You can grab 22 spreads of it for 2 usd here:
https://gumroad.com/l/gcmAv

Second one is just mash up of my all others and I offer it for 0+ usd! Go get it here rn:
https://gumroad.com/l/uQPlQ

Also I have older ones on my gumroad account, some of them for free as well :> I'll be happy if you check em too <3
https://gumroad.com/somik