There are two proper ways of dealing with line breaks in JSDoc. The first, apparently used by Google, is to indent the lines after the first:
/**
* @param {string} author - The author of the book, presumably some
* person who writes well and does so for a living. This is
* especially important for obvious reasons.
*/
This is from the Google Javascript Style Guide:
https://google.github.io/styleguide/jsguide.html#jsdoc-line-wrapping
The second is based on the fact that JSDoc is derived from JavaDoc, which is similar to your second example. See the following link for JavaDoc examples:
http://www.oracle.com/technetwork/java/javase/documentation/index-137868.html#styleguide
I would recommend using the indentation method – I think it is a good cross between clarity of the comment context and readability (not having extremely short lines)