The 25 puzzles in this book are meant to be challenging, but they should be suitable for anyone from 10 to 110 who would like to sharpen their knowledge of the Bible. Aside from learning Scripture, there are clues intermingled in the book that will test your grammar, vocabulary, history, geography and even science. Some clues come with a Bible reference that will help with the solution. Looking up these references will increase your knowledge of where to find things in Scripture. All in all, these puzzles are intended to be fun as well as educational! Stimulating, yet relaxing!