def recommended_books(books):
  book_names = [book.name for book in books]
  good_books = [name for name in book_names if name not in ("LALA", "BLABLA")]
  recommended = [find_similar(name) for name in good_books]

  return recommended

def recommended_books(func1, func2, func3, books):
  book_names = func1(books)
  good_books = func2(book_names)
  recommended = func3(good_books)

  return recommended

def megafunc(*funcs):
  def outer_decorator(f):
    @functools.wraps(f)
    def decorator(*args):
      res = None
      for fun in funcs:
        res = fun(res)
      return res

    return decorator
  return outer_decorator

def megafunc(*funcs):
  def outer_decorator(f):
    @functools.wraps(f)
    def decorator(*args):
      return functools.reduce(lambda acc, fun: fun(acc), funcs, None)

    return decorator
  return outer_decorator

recommended_books = megafunc(
  lambda x: map(operator.attrgetter("name"), x),
  lambda x: filter(lambda n: n in {"LALA", "BLABLA"}, x),
  lambda x: itertools.chain(map(find_similar, x))
)

func_processor = megafunc(lambda x: x)
recommended_books = megafunc(
  megafunc(lambda x: func_processor(map)(func_processor(operator.attrgetter("name")), x)),
  megafunc(func_processor(filter)(lambda n: n in {"LALA", "BLABLA"}, x)),
  megafunc(lambda x: func_processor(itertools.chain)(func_processor(map)(func_processor(find_similar), x)))
)