Over my lifetime I have read thousands of books (estimating from the years I’ve actually kept track). Books are easier than real life: the author filters out most of the irrelevant information from the narrative, internal perspectives provide verification for the emotions being communicated through a character’s body language or tone, and confusing sections can be reread until things make sense while the rest of the book waits. So sometimes it can be a nice escape from the complexities of life to dive into the world of a book – but on the other hand, spending so much time analyzing social interactions in written form helps me to understand them better when I encounter them in the wild, so to speak. There have been countless times when I’ve noticed something happening and thought, “oh! I’ve read about this! What was a helpful response when this happened in the book?” and based my reaction off of what I’ve read.
(The one time someone tried to bully me as a child I thought, “oh, I’ve read about bullies. They are usually sad and insecure people. Poor kid.” I was also highly amused that he though I’d be offended by the name “Four-Eyes” when it was a taunt straight out of the books! How unoriginal!)
Books also help me understand my own emotions. As the characters experience situations and as their emotions are described, I try to put myself in that situation and feel those emotions. This is anxiety: observe the triggers, observe the physical response, observe the words that are used to describe the associated emotional response. This is happiness; this is grief; this is insecurity; this is attraction; this is contentment. I feel things extremely strongly, but I struggle to understand those feelings, and books help me create a reference against which I can evaluate and by which I can name my own emotions as well as the emotions I see in others. And it does this in a safe way, allowing me to proceed at whatever pace I need to, not overwhelming me with sensory input about an unfamiliar or upsetting emotion.
(This is probably why I enjoy books with a lot of emotional content even though I am very uncomfortable with emotional expression in movies or in person. I can take a break if I need to, I can process the emotions slowly and through multiple filters, and I don’t have the intense sensory input of a strongly emoting person to deal with while I’m figuring out what’s going on and why. And I do think it gives me a foundation to work from when I encounter those emotions in the real world, whether in myself or in others.)
So I’m thankful for the gift that books are to me – that on top of the enjoyment of a good story, I have their help in deciphering the puzzle of emotion and social communication, in decoding the physical clues that reveal someone’s feelings, in learning the rules and patterns of social behavior. And that when I need them, they are always there to be my friends.
little thoughts 
Me, too! I also experience alexythemia to some degree, because I, too, feel things deeply and strongly, and often, at the same time! Like my right little toe may tingle in joy while the pit of my stomach feels anxious and my throat is sad and the back of my head feels peaceful. Reading does help! For a few decades, I cycled through Jane Austen novels for that reason.
That sounds really, really, really confusing. Honestly I didn’t even start to realize that different physical reactions corresponded to emotions until I was in college so I definitely don’t have that kind of localized understanding of them! And having them all at once just seems so overwhelming – but also the whole concept of feeling different emotions in different parts of your body simultaneously is very intriguing. I’ve been thinking about it ever since you posted your comment, trying to process how it would work.
Autiists have such great theory of mind! 🙂