Cannot read property 'title' of undefined

Back End Help
#1

kindly help me, i have been having this error Cannot read property ‘title’ of undefined, and i got stuck

bookRouter.route("/:id")
    .get((req,res)=>{
        const {id} = req.params.id
        res.render("bookView", 
        {   
            nav: [{ link:"/books", title:"Books" }, 
                // eslint-disable-next-line no-dupe-keys
                { link:"/authors", title:"Authors"
            }
        ],
        title: "Books center",
        book: books[id]
     }
   )
});


       <div class="row">    
                  <br>
                  <div class="col-md-2 col-sm-3 text-center">
                    <a class="story-title" href="#"><img alt="" src="http://api.randomuser.me/portraits/thumb/men/58.jpg" style="width:100px;height:100px" class="img-circle"></a>
                  </div>
                  <div class="col-md-10 col-sm-9">
                    <h3><%=book.title%></h3>
                    <div class="row">
                      <div class="col-xs-9">
                        <h4><span class="label label-default"><%=books.author%></span></h4><h4>
                        <small style="font-family:courier,'new courier';" class="text-muted">2 hours ago  • <a href="/books/<%=i%>" class="text-muted">Read More</a></small>
                        </h4></div>
                      <div class="col-xs-3"></div>
                    </div>
                    <br><br>
                  </div>
                </div>
#2

I would assume that the problem is here:

<h3><%=book.title%></h3>

book is undefined.

#3

yes thats where my problem is