Hi , hope you are doing well,

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The Book, ART AND MEDICINE BY LEONARD MARK, M.D. if it is in good condition has an estimated value for an of average of $85.00-92.50, depending on the condition and where it is for sale at. These will typically sell higher in an Antique Shop or Private sale compared to an auction. If you are thinking of selling, I would check with your local Shops, Vintage Book Stores in the area to see what yours or one like it would sell for or has sold for. As antiques and collectibles are subject in selling price to different areas across the country..( Larger Metropolitan Areas bring higher prices then Smaller Cities. )
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So be sure to check your local area. This will give you an idea of what it goes for in your area, then you can decide to sell locally or at one of the online markets.

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If I can be of any further help, please feel free contacting me, if there is a problem with my answer please feel free contacting me before leaving a negative feedback, any problem can be resolved.

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And if you would like to use me on any further questions. It works much better putting my name ( Glenda ) in your question , then I will be sure to get it. Requesting me expires in just a short time.

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It has been a pleasure working for you, I look forward to it again.

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Thank you so much

Glenda