Fix spaces in book names for URLs

[abbasou]

Apologies if I'm being too forward with these pull requests. Just trying to make life as easy as possible for you. I'm by no means a developer, but I can tinker around just enough to mess things up. I noted in your source that certain lines don't end in ; like they do in the final build, so I omitted the ; in the pull requests. IDK how all that works, so you'll want to look over it just to make sure I'm not breaking anything.

[tim-hub]

@all-contributors please add @abbasou for code

[allcontributors[bot]]

@tim-hub

I've put up a pull request to add @abbasou! :tada: