Michael Armstrongs book is an invaluable tool for anyone new to management or to general HRM.
His topic coverage is so wide ranging as to leave nothing uncovered and whilst the number of topics does not lend itself to huge indepth coverage, it gives you more than enough information to be able to practically use. Should you wish to research further into any topic, there are numerous excellent references.
I have been using the book in conjuction with my P&D masters degree but find that I use it just as much in my day to day work.
The issues covered range from strategic HRM to specic team focus issues (motivation, teamworking etc) and in between cover the whole gamut of HRM from recruitment to employee realtions,from organisational learning to knowledge management.
Nothing is omitted.
If you are new to management, this book could become your bible. I highly recommend it.