Trying to convert form csv to npz format

Hi,
I am having issues to save the csv file in the npz format. I am using google colab 

npz=np.load('/content/Audiobooks_data.csv', allow_pickle=True)

UnpicklingError                           Traceback (most recent call last)

/usr/local/lib/python3.8/dist-packages/numpy/lib/npyio.py in load(file, mmap_mode, allow_pickle, fix_imports, encoding)
    447             try:
--> 448                 return pickle.load(fid, **pickle_kwargs)
    449             except Exception as e:

UnpicklingError: unpickling stack underflow

The above exception was the direct cause of the following exception:

OSError                                   Traceback (most recent call last)

 
1 frames 
/usr/local/lib/python3.8/dist-packages/numpy/lib/npyio.py in load(file, mmap_mode, allow_pickle, fix_imports, encoding)
    448                 return pickle.load(fid, **pickle_kwargs)
    449             except Exception as e:
--> 450                 raise IOError(
    451                     "Failed to interpret file %s as a pickle" % repr(file)) from e
    452 

OSError: Failed to interpret file '/content/Audiobooks_data.csv' as a pickle

Can you please help
Thanks,

Rd