Digital Electronics!!

If anybody want to know about Digital Electronics then he can download this e-book. What have this book those are describe below,

Chapter 1: NUMERATION SYSTEMS
Chapter 2: BINARY ARITHMETIC
Chapter 3: LOGIC GATES
Chapter 4: SWITCHES
Chapter 5: ELECTROMECHANICAL RELAYS
Chapter 6: LADDER LOGIC
Chapter 7: BOOLEAN ALGEBRA
Chapter 8: KARNAUGH MAPPING
Chapter 9: COMBINATIONAL LOGIC FUNCTIONS
Chapter 10: MULTIVIBRATORS
Chapter 11: COUNTERS
Chapter 12: SHIFT REGISTERS
Chapter 13: DIGITAL-ANALOG CONVERSION
Chapter 14: DIGITAL COMMUNICATION
Chapter 15: DIGITAL STORAGE (MEMORY)
Chapter 16: PRINCIPLES OF DIGITAL COMPUTING
Chapter 17: CONTRIBUTOR LIST