The Yellow Pages used to be a consistent go-to book as was the Sears Wish Book.  Finding people's likes and interests can reveal much.

Fiction - Gone with the Wind (Mitchell)

Non Fiction - The Bible

Business - Raving Fans (Blanchard & Bowles)

Self Development - How to Win Friends and Influence People (Carnegie)

Miscellaneous - Real Estate the Rome Way (our own Margaret Rome, Baltimore Maryland!) 

I never read fiction, and mostly consume audio format these days. My fav. are usually famous people biography and autobiography.  Sometimes, poetry. p.s. Just a minute ago someone on fb recommended me a book about Gucci family. 

Non-fiction, The B-I-B-L-E

Fiction - Robert Heinlein I Will Fear No Evil

Non Fiction - Sharon Osbourne Extreme

Business - Rod Santomassimo Brokers Who Dominate

Self Development - Don Miguel Ruiz The Four Agreements

Miscellaneous - Jack Kornfield The Wise Heart

For me this is an easy answer, Nick. At this stage of my life I no longer read business books or self-development books. Haven't heard anything new in ages. I read fiction to escape and I don't have any one book, I'd recommend... I have lots of favorite authors (and they probably are more of a girl thing, in any event). And usually, my favorite book is the one I'm reading at the moment.

But if you're looking for a good business/self-development recommendation, check out Bob Burg's "Endless Referrals." Best book I ever read on this topic.

Business - The Go-Giver...

So far in the month of January, I have read:
Dare To Lead (Brene Brown) 
The Man on the Mountain (Susan Trott) 
Recession Proof Graduate (Charlie Hoehn) 
Atomic Marriage (Curtis Sittenfeld)
In Pieces (Sally Field) 
Of the above list, if I had to choose One to recommend, it would be Dare to Lead.

The One Thing, fits into at least 3 of those categories.

Fiction -11/22/63 by Stephen King, Dark Places by Gillian Flynn, Becoming by Michele Obama, Where the Crawdads Sing by Delia Owens

The first one that comes into my mind is "The Secret".  

Business  and non fiction.  I am a history buff

Fiction - The Kent Family Chronicles by John Jakes. It is actually a series of eight books and I could not put it down. Also his North and South trilogy but that is best read after the Kent Family Chronicles.

Non-Ficton - My Personal Best by John Wooden is his autobiography and a good read.

I do not have any recommendations.

Read Walter Isaacson's biographies of great men. Read scinece fiction which is really speculative fiction to get your imgination going. 

I make book recommendations in my blog posts every week. Fiction and non fiction.

Two highly recommended books...non-fiction and historical fiction...

Book Recommendation: Chesapeake Requiem by Earl Swift

Book Recommendation: The Great Alone by Kristin Hannah

Nick,

Between the two of us, we keep Amazon happy when it comes to books...I have like the unabridged version of Think and Grow Rich, we like Jim Collins Good to Great!  I think those two fit self develoment and business.  I like Carlos Casteneda, The Teachings of Don Juan.  Fiction, I like mysteries set in different countries.  I am reading one set in France's wine country...  We read a lot.  I think I go through one book a week.  A

Fiction - The Foundation Trilogy, Issac Asimov

Non-Fiction - The Bible

Business - See You At The Top, Zig Ziglar

Self Development - Think and Grow Rich, Napoleon Hill

Miscellaneous - Daring To Live On The Edge, Loren Cunnigham

I have o time for books these days, my job is enough of an adventure for me. 

Fiction - no favorite

Non Fiction/ business - The 4:2 Formula  - Jeff Shore

Self Development - The Seven Habits of Highly Effective People  - Steve Covey

I have been reading a series of spy novels by Tim Tigner a former U.S. Special Forces Counterintelligence officer. Very entertaining. If you like this type of diversion I highly recommend them.

All categories...

Raving Fans - Ken Blanchard

Not just one ... there are too many.  I have so many books and continue to read and grow.  They are all jewels. 

I hate fiction. Bio or history. Last Mrs Whitehouse new book was awful.

I like to read "who cone it" mysteries.

Self Development.

I have not read a book in years so I have no recommendation

So many in each category.  How does one choose a favorite child?  Here are some of my favorites:

Fiction: The Testament by John Grisham
Non-fiction: A Walk Across America
Business: Mindmapping
Self-Development: How to Win Friends & Influence People 

Truth is, I read so many business books in my working days that my brain got tired.  I'm mostly into Fiction and inspirational reads these days. 

Depends on what you like to read.

All sources have their base in Truth...Seek Truth and all are allowed