Aien Worlds Builder has some real potential, and I can see exactly where the author was going with it what lets it down are the typos. I can forgive a typo here and there, but in this case we're talking about many per page. A couple of proofreads would have fixed it. Also the layout on the last page is skewed with the banner running into the header making it impossible to read.

This product feels like it was just knocked togeter as fast as possible to make money. The information contained inside is good, but the lack of care in the execution really let's it down. I'm glad I'm glad I got it for half price, and even that was too much with such poor production values .

For your money, you get a nice high-resolution JPEG of an original drawing of Charles Babbage... excellent if you are a steampunk fan or just like the history of computing. It is well-drawn and reasonably true-to-life (or at least to surviving contemporary portraits, I'm not THAT old...).

Although the product blub states that its use in your own projects is subject to the terms of the attached license, no license - indeed nothing but the JPEG itself - is supplied with your download. So you may want to check with the artist if you want to use this sketch in something you are publishing. Being a computer-herd by trade, I'll probably just stick it on the wall.

By the way, INVENTOR, not INVENTER :) (Yes, I'm a teacher too!)