Can you recommend some good comprehensive books on fixed-point, big num Maths with code examples in C/C++ ? If it has practical applications showing usage that

Can you recommend some good comprehensive books on fixed-point, big num Maths with code examples in C/C++ ? If it has practical applications showing usage that would be even better. I am interested in knowing how you get precision in Computers both by using floating-point and by substituting it with equivalent fixed-point representations.