Hello! May I join the team and ask a couple of questions (plus offer a free giveaway)?
I have recently taken up colouring in as a stress-busting activity and man, it has become completely addictive. I've been following this thread closely to see what pens and pencils you're all using and have made some (actually, far far far too many) purchases 
I'm working my way through the Secret Garden book, which I love, but to my horror have just realised that my two latest pen purchases, the Spectrum Noir markers and the Crayola Supertips, can't be used because they seep through to the other side of the page. Aaaargh. Has anyone else found this?
I love the Secret Garden and thought the paper was really thick and good quality, but I think possibly because it's a creamy colour and not pure white, this might mean that it isn't coated with anything that might stop the ink from going through to the next page. Or I might be making this up as I go along. Has anyone else had the same problem? I'm really cross as both sets of pens are fab otherwise as I was a bit bored with only using my Staedtler Fineliners.
Finally, I bought a copy of the Gorgeous Colouring Book for Grown-Ups on Amazon, but I don't think I really like it - I prefer the teeny-tiny intricate drawings in the Johanna Basford book and think I'll just buy another one of hers next. Would anyone like the Gorgeous Colouring Book? I'm more than happy to stick it in the post and send it free to a good home if someone can use it. PM me if you're interested and I'll stick it in the post next time I'm out.
Loving everyone's creations, by the way. I'm looking for inspiration as I seem to use the same sorts of colours over and over again and must try to branch out a bit.