This book can be read quickly to get a general idea of
what an inventor needs to do, then it can be read in
more detail as the inventor tried to figure out
whether a particular expense is tax deductable or not
(or maybe it can be depreciated).
The chapters are targeted well to an inventor's needs:
Chapter 6 is about how to prove to the IRS that you are
serious about your inventing activities.
And, by the way, there are surprises. A naive inventor might
even think about taking any deductions, but the $25,000
immediate deduction for long-term property is a pleasent