I don't often find it necessary to post about updated art technique books, but in this case I just have to make an exception! My original review of Pigments of Your Imagination is at the link, and everything I said there still stands, but...
But. Now there is Pigments of Your Imagination, 2nd edition. There are additional breath-taking images included throughout the entire book. I was worried at first because the cover says 50 bonus gallery images, but that's not all. There are additional images included in the techniques and step-by-step sections, making it even easier to follow along. There are also fourteen brand NEW techniques and tips added that nicely round out the instructional sections. Cathy Taylor's work, of course, is exquisite, and the gallery section includes her work plus much more by other artists.
So there! If you bought the first edition, definitely at least look at the new one to see the new techniques. If you didn't buy it back then, and you'd like to work with alcohol inks, then don't delay this time!