Mortgages and credit are subjects that, like IBM programming manuals, make little sense until there is something specific that you actually want to find out about them. Given the intrinsically snooze-worthy nature of the subject, this book was, in fact, fairly interesting.
This book was first published in 1996. Unless there is an updated version, I expect that much of what is in here is somewhat outdated; the big mortgage crisis in the early 2000s has caused many changes in the rules for the government agencies that oversee insuring mortgage loans and in the kinds of programs available to people with lower incomes and less than stellar credit.
However, some of the information here is probably still good. There are some good sections explaining terms involved in mortgage lending and in unusual ways of purchasing a home. There is also a good section at the end on how to clear up your credit record if yours has been damaged by incorrect or outdated information.