Following an unwritten ritual many amateur astronomers will pursue an observation path through the heavenly bodies starting with the moon, planets, deep sky objects [Messier Objects, Herschel Objects and of course the Caldwell objects]. It's like the Rite-of-passage to attain your "Amateur Astronomer" insignia. This group of books from Springer are a good companion on this little journey through the heavens. So, here is another one of these little books dedicated to the "109 Caldwell objects".
The Book consists of 4 chapters, with each chapter dedicated to a specific topic to bring this whole book together.
+Chapter 1: An introduction the man himself "Sir Patrick Caldwell-Moore" who has enriched us for many years with his knowledge and efforts as a leading amateur astronomer.
+Chapter 2: Offers a Summary of the 109 Caldwell objects, for each object you get:
- Some bullet information such as Magnitude, Size, Star hope, Best Visual Aperture, Best Visual Filter, CCD/DSLR, Celestial Neighbours, Miscellaneous and a few more.
- Some 20 to 30 lines of text with General description for each object. Tips on locating and observing the object and a bit of its history and interesting information.
- A Picture of the object, mostly a high quality image and some times a Star Map to help locate the object and other close by objects.
- Mostly an empty half page. "Yes Empty"
+Chapter 3: A few pages on how to visually observe the Caldwell Objects.
+Chapter 4: A few pages on how to digitally observe the Caldwell Objects.
How do I feel about the book?
Sorry, but the book has a few short comings, the claim that it "Comprehensively describes all of the 109 Caldwell objects" is not all that accurate; barley a few bullet notes and a 20 to 30 lines of text with General description for each object does not qualify as "Comprehensive". Other books set that bar higher with a lot more details on the Astrophysics and History of each object along with the Observation details.
The two tiny chapters about Visual and digital observation barley touch the subjects. They skim through the topics Information about the optimum astronomical equipment. Some may argue that these two chapters are not needed as there are books out there dedicated to best observation practices.
The empty half page that exists after nearly each object could have been used better to illustrate how the object looks through the eyepiece for an observer for example. I like the idea that each object occupies its own page but this space can be used for something useful.
No maps exist of the Constellations' and the Objects, so for that you need to get you star atlas or some of the materials on the internet. It would have been lovely to have a nice foldable insert with a map showing all the objects.
In conclusion, the book is "A Simple list with a brief summary of the 109 Caldwell objects". Other books in the series about Nebulas, Galaxies and start clusters etc. are more oriented to giving you information about the Astrophysics and Science behind each category of objects and how to observe them more comprehensively.