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!

I love logic problems and was so excited to get this, only to discover that several of the puzzles had already been completed. I returned it.

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 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.

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.

Lots of puzzles of varying difficulty, which was nice.

Like this one but not enough clues!

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.

There are a lot of puzzles in the book which is great. What I didn't realize is that they are all the same size - 5 elements with 3 pieces of information to work out. Not really very challenging at all.It would have been better if there had been some with 5 elements and 4 or 5 pieces of information to work out.A pity as I'm not that interested now.

Keeps your brain amused for hours.

Can not fault the product or the delivery, very pleased !

Not easy to find anymore. Great!

Hours of pleasure