In your opinion, what makes a book worth recommending?

I agree with experts answer. Thanks for the invitation

i think its literature makes a book worth recommending

In my opinion, a book should touches our heart in such a way, that either it should create us a new world of happiness and hope, or it must be give us relief from tension and troubles around us. Such a book is worth recommending to our beloved ones.

It must bring a message, has to teach, entertain, provide some moral and be not a waste 

Its contents, if they are acceptable to your mind & heart then it is worth recommending

In my opinion, a book worth recommending is the one that leaves you with a lasting impression.

A book is worth recommending if it is able to draw you into the story and make you feel as if you could get immersed in what is happening, leaving you wanting more. 

I would recommend a book based on the delivery of information - be it fictional or non. While some stories have a good story line, it's it's not presented in a cohesive manner it becomes hard to following and the reader loses interest. If it is book offering some information then it's better make the book relateable, so if that's something I can get from it, then I will recommend it to others. 

The relevance of the content has to be there. Also the cover page and the pages inside the book should be of good quality

In my opinion it should be according to the readers maturity of language skill and understanding.

A book is worth recommending if I have read it myself and learn something from it.