248 pages of thought-provoking card work --sometimes provoking the thought "why did he include this in a book?"      But...  although some of the stuff is a bit esoteric, it is all interesting.  (I say that about all of Harry's books -- there's always some trash among the gems...     However, Quantum Leaps certainly has more gems than trash, and includes the "best Gosh darned impromptu linking cards" routine (immodestly dubbed so by Harry himself).  Despite Lorayne's tendency to oversell his effects, this linking card effect (based on an old rubber band move) does live up to its moniker.   There is also a neat poker deal mental effect, the illogical double lift (very useful), and a neat four card revelation -- these are just four of my favorites from this book, which includes many more items of interest.  

A first edition that is increasingly more difficult to find, currently fetching prices of $45-$55 when it is posted online.   Get one here at TMGS the easy way, and for less!