def get_order_book_simple(asset1, asset2, min_pct_fee_provided=None, max_pct_fee_required=None):
    # DEPRECATED 1.5
    base_asset, quote_asset = util.assets_to_asset_pair(asset1, asset2)
    result = _get_order_book(
        base_asset, quote_asset,
        bid_book_min_pct_fee_provided=min_pct_fee_provided,
        bid_book_max_pct_fee_required=max_pct_fee_required,
        ask_book_min_pct_fee_provided=min_pct_fee_provided,
        ask_book_max_pct_fee_required=max_pct_fee_required)
    return result