All three volumes

We are going to study all three
Of the learned professor’s
Works this year;
Volume one;
Volume two and
Volume three.
I have already bought
Volume one;
I am still to buy
Volume two and
Volume three;
I cannot afford the money
At once;
Hence, I have drawn a plan;
When we are half way through
Volume one,
I will buy
Volume two;
When we get to the middle of
Volume two,
I will buy
Volume three.
This way it shall not be
Too hard for me.

#daily-prompts, #poem, #volume