Not really, i found them all to be very informative and illuminating,
A Study in the Nature and Development of Spiritual Consciousness is quite a detailed discussion (if only because of the abundance of references

over 900 IIRC) which was written just before the outbreak of the Great War, and
The column of dust is a novel which could best be described as a alien invasion.
I think that all her works are valuable for those interested in the expansion of their soul - and the ways to attain it.
Peace, Love, & Light