The first images are map tiles. They form the World's terra firma. They are presented here from the ones that are the fastest to move over, to the slowest. Although you don't really know what they are like till you try them.
Next are the items you may come across. There are all sorts. This catalog created by the keepers of course only includes all items that have been found. They may be others that many have not found. Also, this is only what they look like. It is up to you to determine their characteristics ... but some help may be found in the great tomes of the keepers ...
Next the creatures. Remember that not all the creatures are your enemy, some are quite friendly. Although this catalog contains what they look like, it does not contain their behaviour. That is something you must work out for yourself.
Finally, attributes and other images you may see in your wanderings.