A very good book. It left me wanting more. I spent many happy hours trying to solve some of the "MB" harder puzzles. Very good exercise for the little grey cells. Even old chestnuts are dusted down and given a neew lease of life. "Scruffy Sam has put on his T-Shirt. Unfortunately it is inside out and back to front. Normally the washing label is on the inside of the left sleve. Where is it now?" Basic puzzles like the above, to complex ones that take days to mull over. All well written, well laid out and well thought through.