Observing guides and images
  *  Kenneth Glyn Jones.  _Messier's Nebulae and Star Clusters_.  Sky
 Publishing 1968, 2nd ed 19XX.  427p.  A great handbook and resource!
 Contains introduction to historical and astronomical background together
 with data, historic and newer descriptions with a finder chart, drawing,
 and photo (in appendix) for each object, plus biographical and historical
 material on Messier and the other discoverers and early researchers of the
 Messier objects.

  *  John Mallas & Everitt Kreimer.  _The Messier Album_.  Sky Publishing
 1978, 248p.  Messier biography (by Owen Gingerich), reprint of Messier's
 original catalog (in French), descriptions for each object (but M102) with
 finder chart, drawing (from 4") and b/w photo (12 1/2").  Messier object
 chart of the Heavens, check list, color photos of some, 248 p.

  *  Hans Vehrenberg.  _Atlas of Deep Sky Splendors_.  Vehrenberg+Sky
 Publishing 1st ed.  196X, 4th edition 198X, 242p.  Original title: _Mein
 Messier-Buch (My Messier Book)_.  Schmidt photo charts of all Messier and
 many other Deep Sky objects, partially color, descriptions, some with
 photos from observatories.

  *  Don Machholz.  _Messier Marathon Observer's Guide -- Handbook and Atlas_.
 Make Wood Products, P.O.Box 1716, Colfax, CA 95713 (USA).  Interesting
 stuff on Charles Messier, his comets, his catalog including discussion of
 "nebulous" (missing, stellar, and the star cloud) and "add-on" objects, a
 catalog, finder charts, plus proposed Marathon.