The Great North Road by Peter Hamilton
Set in the north of England, in the future, this huge book has everything. There are brutal crimes, thrills, intrigue and mystery. It has a complex plot requiring a certain amount of concentration, so not a super-relaxing read, yet smooth and comfortable in writing style. There are fascinating ideas for other worlds and methods of travelling through space. And there is always the desire to try to solve the puzzles. I love this book.