I am always on the hunt for things to read to my godchild. This was free today, I am glad I didn't pay:
The author did zero editing. For example, when Johnny and Spaceboy are flying over one of the seven wonders it says: "It's one of the seven. wonders of the world." Followed by "What are the other <no. Wonders?" And then: "We haven't got time to see them all today. They are <wonders." Said Spaceboy. I'll show you the pyramids."
Outside of the many grammatical errors, there are also huge issues with some of the facts. Spaceboy states that Africa and Australia are similar in size. Africa is FOUR TIMES larger.
Outside of all this, the illustrations seem to be drawn by a child, which would be fine but the author does not credit a child so we are left to assume the drawings are by them. The drawings themselves can be seen as odd (there is one where it looks like Johnny is grabbing his mother's butt, a creepy faceless president.)
The story itself, even if the above things were corrected, would not engage a child at all. The entire stoey is summed up as "A boy meets a spaceboy that spouts off random facts, some incorrect, from wikipedia then drops him off. The end."
I feel as if this was written in one night with zero correction. I have not read any other books by this author, but if this particular entry in their bibliography is any indication, they ought to take some online courses in story structure and grammar.