Because by the time you get done typing it up(time spent) and printing it out(money spent on ink) you could have a book for roughly the same price that is proffesionally done. I'm telling you they thought of everything. Plus when I got the book I took a page from each section and scanned it to my PC. So if I need extra I can just print them out.
Some peolpe can't justify spending $30 on it but it helps me out all the time. Especially the section on livestock, where I can keep track of fish, corals, inverts and when I purchased them, how long I've had them, who they get along with, it's endless. Just my 2 cents.
Does anyone else have this book?