A gorgeous and inspiring book, but lacking in a key mechanical area: The running of wires through bricks.I'm a newbie at Lego lighting, and found that the biggest frustration with the commercial kits I've tried was actually running the wires between/along side/under/ & through the bricks. And I'm sure this applies to 100% DIY jobs as well.The kit suppliers want you to think that you can snap in the wiring as easily as putting together the basic Lego kit. If tools were needed, then they'd lose too many sales. But trying to jam wires between and under bricks as they suggest just doesn't work- the bricks never fit back together again properly.Now I'm an experienced scratch-building hobbyist, so I have tools and know how to use them. To make my lighting kits fit, I don't mind modifying bricks. For example, I'll file chamfers along the bottom edges of bricks that fit together side by side, making a nice channel for the wires to run through.Where wires have to run under a brick, I use my Dremel tool to make notches to create a channel that way.Sometimes the answer is to drill a hole right through a brick...no problem!I have also done things like mill out the area under a stud to make room inside a brick or flat plate or "cheese" for a lighting "dot"- lots of this was needed on the 21335 Lighthouse.Then there's the issue of loose wires + junction boards vs. "trunk" wiring. The former is definitely more flexible, while trunk wiring, where multiple lighting branches bundle together into a single trunk going to the power supply, is a pain to deal with. Lightailing seems to like the trunk model.But anyway, I didn't find any hints of this sort in the entire book... a fundamental shortcoming.