Reddit reviews Bonds: The Unbeaten Path to Secure Investment Growth (Bloomberg)

Have a look at this book: 'Bonds: The unbeaten path to secure investment growth'

Thank you for your replies. I still don't necessarily understand how people lose money on bonds if they hold them until maturity. I know that increases in inflation make bonds bad to hold, but how does a bond fund report a negative return? I was planning on structuring something where I have some amount set aside in CDs and/or a bond fund then put 20% of the remainder into 5-yr bonds, 30% into 3-yr, 50% into one year bonds (though I have put almost no thought into this and would have to weigh the effects of fees into everything). Could I ever get less back than principle - fees? I'm reading a book and wouldn't look to actually enact any of this until I had a much better understanding of bonds, though I do look at the act of buying and holding actual bonds as a valuable learning experience.