Does not recommend this product
@denislav_jeliazkov, I just purchased the Master UI eBook this morning and unfortunately I'm finding that there are parts that are not well written. For example, the first thing addressed in the chapter on Typography is the Rule of Four yet the rule is never actually defined. I have to deduce what it is based on the examples given.
Page 27 has the title of Creating Hierarchy but then goes on to talk about spacing and line height without ever mentioning how they relate to creating hierarchy.
On page 29 the first sentence reads, "The safest route for you to space your long paragraphs is to multiply it by 1.5." What is "it" that I'm supposed to be multiplying? That isn't clear at all.
Sadly I can't recommend this book. It needs to be given to a copy editor so that spelling, grammar, and most importantly clarity can be improved.