My son has been asking me for an astronomy (or space science) textbook for months now. He discovered his Dad's old college astronomy textbook on our bookshelf, but he wants a textbook that's aimed at kids or teens, not adults. I ordered space encyclopedias from Amazon, thinking they would do. Nope. He wants a bonafide textbook with units, questions, etc.

I tried looking at some homeschool resources but kept getting books with a decidedly religious viewpoint. I'd like him to be able to synthesize religion and science in his own time and his own way, so those books are not an option. I found some textbooks on Amazon that were $100+, which is steep. Other texts were cheaper but were black and white. Does anyone have any suggestions? Thanks!