Read multiple holding register in pymodbus

Question

I'm using ModbusSerialClient of pymodbus library. I've multiple registers that I want to read.

I'm able to read one register at a time, but not able to figure out how to read all the registers at a single time for better performance.

registers = [3900,3902,3904,3906,3926,3860]
client = ModbusSerialClient(method='rtu',port='/dev/ttyUSB0', timeout=1, parity='N', baudrate=19200, unit=1)
client.connect()

for register in registers:
    response = client.read_holding_registers(register, 2, unit=0x01)

I've tried something like this

add_min, add_max = min(registers), max(registers)
no_bytes = add_max - add_min
response = client.read_holding_registers(add_min, no_bytes, unit=0x01)

But it's throwing "Illegal Address" error.