Colossal Grab A Pencil Book of Logic Problems Paperback – October 7, 2015

I have purchased many logic puzzle collections and this one, as well as the mammoth puzzle collection, are hands down the best.Pros:The puzzles are quite challenging overall, but there are varying difficulty levelsThe puzzles are creative. They are not all solved the same way, some have extra variables, and you can tell these were written by a person and not a computer (looking at you, puzzle baron).The puzzles are diverse and unique.Cons:No answer table. I know some people use these to solve the puzzle and some just like to have the answers down to compare to the answer key. I don’t mind its absence.I love these books and wish there were more!

Arrived on 1/8/18, earlier than I expected. Looks great, Best part is that the answers are not just listed, but contain the reasons for each answer line by line. That is something I love. I look forward to working this book.

It's all grid logic puzzles! Pretty nice paper. The two downsides are:The puzzles don't have the "fill in the answer table", which I use for harder puzzles to figure them out.The first 50 or so puzzles are SUPER easy. But the puzzles do get SIGNIFICANTLY harder, so I use the easy puzzles as like a break from the extremely hard ones.

I was sent a book that had the first 25 or so puzzles already completed. Wasn’t thrilled to get a used puzzle book when it was supposed to be new.

I have reviewed this book and started working some of the problems. It is a great brain buster and is good to pass time or if you just want to spend time alone exercising your brain. I received this book at a discounted rate for my honest and unbiased review of the product. I refer this site to all my friends and family.

Exactly what I was looking for! the problems start off really easy but then they do ramp up their difficulty. Great way to keep myself busy and pass the time! highly recommend if you are into these sort of puzzles.

Do not buy unless you are a Rocket Scientist or a Brain Surgeon !!!!!!!!!! The clues are much too difficult to understand and apply to the grid. I have tried many other Logic Puzzle books and this one give me a headache every time that I try to solve a puzzle. I gave it a 1 star only because I could not give it a zero (0).

Logic problems are hard