Children who are just beginning to read for themselves will love Young Puzzle Adventures books which hav e an exciting story and a puzzle to solve on every double pa ge. This book is colourful with plenty to spot in the detail ed illustrations. '
Much easier and with 3 mazes in 32 total pages (16 page spreads), the plot is even more simplistic than in Usborne The Missing Unicorn., and there is no carrying forward of information for later puzzles... well, there was, but then they give you the details again, in case you'd forgotten them. These are just a little too easy for us at the moment, though they are still giving enjoyment (I found it rather tedious to read, and the puzzle was always proudly solved before I got to the end of the blurb).
The text is not written for a beginner reader to tackle solo (though it would be possible, of course - several large and daunting words for say a 6 year old, which might discourage). I think the intended use is for an adult (or maybe a teenaged babysitter? That would be a handy distraction for bored charges!) to read and guide, and for the child to solve the puzzles. In this case, I estimate the target audience to be anywhere from 4 to 6 years old, maybe you could stretch it down to 3, depending on the kid in question.
Child wanted to grant it 4 stars (nope). I took off a star and almost took off a second for 'flying penguins'. I can't honestly say if it was meant to be a fantastical joke or the result of zoological ignorance, but I think it was the wrong choice for such young readers - the joke becomes dangerous misinformation if you time it poorly.
Also, Lucy and her Sea Monster seemed to be inspired heavily by Green Smoke, which we recently enjoyed (currently reading the sequel, Dragon in Danger between other things).