While other posters have identified a major problem with your categories, the biggest problem you will have ( once you get the categories sorted ) is the actual books you are selling. They are all generic stuff that is available in any Op shop or garage sale for a few dollars.  ( maybe that is where you are buying them ) There are millions of books listed on ebay. A search for " Donna Hay " shows over 3200 listings with only 182 sold in the last 90 days. When selling into a saturated market you need to find unique or rare items that are not in competition with thousands of other sellers. 

I sell books and the only ones I might even vaguely consider selling out of your listings is the indigenous biographies. They are specialised, but even with these there may be quite a number for sale as they are recent printings.. Only around 1 in 80 - 100 books has any real value and probably only 1 in 1000 is worth more than $50. You need to research what books are valuable and try to find and sell these. A great way to do this is to do an advanced ebay search on sold books over $40. ( Use the " advanced'  icon next to search bar at top of most pages ) You will soon start to see a trend with specific subjects and types of books that have genuine value.

Basically your main task is learning how to identify and find the rare stuff. Its out there, but not in Op shops at a price you can make a profit on. Most Op shops have people who are invited out the back to buy the rare stuff, or they sell it online or through dealers themselves.