Reddit mentions of Stigum's Money Market, 4E

• Hull's Derivatives is the bible
  
• Stigum's Money Market is a legitimately enjoyable read and taught me SO MUCH
  
• Fabozzi's Fixed Income Handbook is a good general overview of the FI market. (More widely known than, but not as good as Stigum's.)
  
• I don't know where your programming skills are, but try to model out anything that you find interesting in the books above using Jupyter. This will help a great deal with internalizing what's happening mechanically underneath the concepts you're learning.
  
• How I Became A Quant for easy train/bed reading.
  
• Mandlebrot for a dose of realism. Models are always wrong.
  
• The Medium of Contingency for a glimpse into the mind of a practitioner. It's... weird.
  
• Cliff's blog because he's humble (and also my idol). His chapter in How I Became A Quant is the best, imo.
  
  disclaimer: Not a quant, never went to school for it nor worked in finance. I just like reading. This list is more than enough for the summer, but let me know if you want material focused on anything in particular. (Structured products, history, etc.)

The Wordly Philosophers a great book explaining how we came to think of economics today by looking at it's most influential thinkers

Stigum's Money Market a fundemental look at how modern money markets work

History of Economic Thought looks at economics throughout history, taking into consideration the unique historic and cultural context of different schools of economic thought.

It isn't math related but if you want to skip a course on banking but still learn a great deal about how money markets work (spoiler alert: courses in Econ departments on "banking" are often just a combination of intermediate macro and money markets), I would strongly recommend Marcia Stigum's Money Market. New editions are pricey but most of the content is there in older editions. I recommend this book mostly because it gives an intimate and practical account of the channels through which macro policies effect other markets--something which is liable to be glossed over until later in your studies unless you focus on financial markets.

Because Euro rates are low and going negative (Euro libor is negative right now). China is also devaluing their currency/rates to stimulate their economy in light of the trade war.

If there was no rate cut and the above continues to hold, the US dollar will be further weakened against these currencies - which already is & will continue to impact the US economy.

People here seem to believe that because the rate was cut, it is an indication that the US economy is doing poorly which is quite a simplistic and possibly quite ignorant view. That's not how the Fed works. There are many factors that come into play but right now it's mainly the Euro/China rates.

I encourage people to understand the money markets. Marcia Stigum's book is a great start.

https://www.amazon.com/Stigums-Money-Market-Marcia-Stigum/dp/0071448454