Answer:
The bottom 2 are different from what the other person said. I used different examples, but the person above is correct as well.
The date the book was published can influence whether the information is outdated or not. For example, medical procedures within the medical field are always changing so, if the book was published four years ago, the information may have changed.
Who published it can influence whether the information comes from a reliable source or not. For example, if you are looking for a book about geometry, and the publisher is someone who specializes in zoology, it is most likely an unreliable source.
Check if the book is self published or not. Again, referencing if the source is reliable.
Check the accuracy of the information. Using multiple resources may tell you if the source is reliable or not. For example, if a book says lions are the strongest wildcats, but three other resources say tigers are the strongest wildcats, then more likely than not, that resource is unreliable.