I finally got this sketchbook on my hands, after being sold out everywhere online. I want it so badly that I wrote to mr. Stillman on Facebook and asked him to put it back available at Amazon or eBay or anywhere else and he answered me ! He advised me a French online shop where they have some sketchbooks available. Great, a shop on the same continent as me! So now I have three of these sketchbooks to fill with daily sketches. Yay! They are Beta series, premium sketchbooks, dry and wet media, watercolor and ink , soft cover and they are square. Paper inside is high quality for watercolors (270 gsm), cold press which makes a wonderful soft texturized surface paper , I love it. The square format ( 19x19cm ; 7 1/2 x 7 1/2 inches) it’s a lovely compromise between an A4 and an A5 sketchbook, it allows you to compose different sketches on the same page , something I couldn’t do on a A5 format. 
At Sintra on a beautiful cool day . I walked almost 2 km just to sketch that castle, only possible because was such a fresh day.
A picnic at the forest and time to sketch again
At Oeiras harbour with my new pen, Confucius fude
Paula Lourenço sketching 