Yes, it is. And the books that I like the best are the ones that make you hungry for more information. And if those books have a good bibliography, that is a starting place to search for more material.
As an example, I saw an interesting book listed in a Recommended Reading List, JB Avril's Avantages d'une bonne discipline, and found it forty years later. It is a gold mine of information for the French infantry of the period including all of the amalgamations during the Revolution and the ancestry of all the regiments. It was published in 1824 or 1828 and it is a great reference.
Another one is Grands Artilleurs by Girod de l'Ain which has the original correspondence of Drouot, Eble, and Senarmont and is another gold mine of source material.
Lastly, I was fortunate to be given 25 volumes of the old La Sabretache, hardbound books, not magazines, which has thousands of pages of information that mostly hasn't been used in English yet. I've had them for about twenty years now and frequently refer to them for information ranging from letters, uniform material, etc.