Does obsidian actually attract mobs?

I read in a book (Minecraft Ultimate Book Of Secrets), on page 71, the following statement:

Obsidian actually attracts mobs

I didn't believe this. I tried to Google it, investigating several wikis and forums to find an answer. I can't find anything saying whether obsidian does or does not attract mobs.

Does obsidian attract mobs?

You're not going to find anything saying it doesn't, simply because you could make an article infinitely long listing the things it doesn't do. That being said, no, obsidian, and every other block for that matter, doesn't attract mobs. Monsters can spawn on obsidian if it's dark enough, but it isn't any more likely than any other block.

I'm 99% sure that the book you read isn't official. Blocks don't attract mobs.