If you are really ready for a book to blow your mind, I urge you to look this one up and sit with it a bit. This book was originally published in 1903, and provides a technical and introspective description of pattern design in areas of building a design, practical applications, and the greater story surrounding the art. I personally love words and diagrams, and this book weaves them together so well. It is in part a romantic saga of an artist... part technical engineer's manual.
In the first paragraph of the chapter, "WHAT PATTERN IS", he speaks of patterns as if they are a mysterious presence that is part of our environment whether people recognize them or not.
"To readers of a book upon the subject, no apology for pattern is necessary. Modest as may be its pretensions to artistic consideration, it covers ground enough to command attention. It is here and there and everywhere about us. There is too much of it by more than half -- and more than half of it is of such a kind as to make the discriminating wish they could do without it altogether. Still, there it is; and there is no escape from it."
If that is not intriguing to you yet, discover your perspective on what he says about finding pattern in nature:
"The daisies make a pattern on the lawn, the pebbles on the path, the dead leaves in the lane; the branches of the trees above, the naked twigs against the sky, the clouds that mottle the blue heavens by day, the stars that diaper their depths by night, all make perpetual pattern."
I must say this book may not be for the casual reader. It can be complex and challenging to read. But even without investing a lot of time in its pages you can glean a deeper understanding of the art and design of pattern making... and it may just make you start to see grids (where most designs are built) in everything you see. And it is a new world!