from typing import Optional
from pydantic import BaseModel
from fastapi import APIRouter, HTTPException

router = APIRouter()

# In-memory storage
books = []

@router.post("/bookies", status_code=201)
async def create_book(book: BookSchema):
    """Create a new book"""
    if request.method != "POST":
        raise HTTPException(status_code=405, detail="Method Not Allowed")

    book_data = book.dict()
    book_data["id"] = len(books) + 1
    books.append(book_data)

    return {
        "method": "POST",
        "_verb": "post",
        "message": "Book created successfully",
        "book": book_data
    }
```

This code defines a POST endpoint `/bookies` that creates a new book in the in-memory `books` list. It uses the `BookSchema` model from Pydantic to validate the request body data. The response includes the created book data along with the HTTP method information.