A number of times, questions have been asked on this website about good books on Algebraic Topology and the responses have been very valuable. However I need some more specific advice in this matter. I have studied basic point-set topology (first few chapter of Munkres's Topology) and basic algebraic topology (all of part II of Munkres's book). Now I wish to learn more algebraic topology from a categorical viewpoint. I am aware of the books by Hatcher and Bredon, but they are more geometrically flavored. I have heard that Spanier is a very nice book and meets the criterion of being categorical. But it looks to be very old and I am afraid it could be outdated. I wish to ask :
Is it true that the book Algebraic Topology by E.H.Spanier now outdated or is it still advisable for a person with taste for category theory to study Algebraic Topology from this book ?
From the answers to other questions on this site (as well as MO), I learnt about the book 'Algebraic Topology' by Tammo tom Dieck. It appears to be very attractive and sort of modern version of Spanier. However from a review here I learn that this book is recommended exclusively for brightest students. So I wish to ask :
Are there any supplements which can be used alongside Tom Dieck's book as and when one gets stuck ? Can Spanier be used as a supplement to this book, or the approach/organizational differences will be hindrances ?
How does Tom Dieck's book compare with Spanier's in readability ?
Two more books which do not hesitate to use category theory are Homology Theory by James Vick and Algebraic Topology by J.Rotman. However Vick's book does not cover cohomology and homotopy theories and the book by Rotman looks nice but sort of intermediate between Massey and Spanier while I am looking for a comprehensive graduate level book.
Are there any other comprehensive, categorically flavored books on the subject at the same level as Spanier or Tom Dieck but that could be easier to read for self study ?
Edit : Just wish to add that I have had graduate level courses in algebra including category theory and homological algebra.
Spanier is not outdated. I read about half of it, and it never felt like an old book. Actually I think that in spirit it is more "modern" than many of the so-called modern books. Apart from that when Spanier's book was written, the foundations of algebraic topology were already laid down. Of course it does not include some of the new developments, but these are anyway too advanced to be included in an introduction to the subject. [But if you really want to read about them, see Switzer's book.] That being said, Spanier's book is more sophisticated than e.g. Hatcher, because Spanier includes e.g. spectral sequences.
I do not consider myself very bright, but I must say I feel that Tom Dieck is easier to read than Hatcher, because it is written more clearly and more carefully. Also Tom Dieck is very systematic and does include e.g. the method of acyclic models, the Eilenberg-Zilber theorem (as does Spanier), which Hatcher doesn't. I don't think that Tom Dieck is much more modern than Spanier, also TD does not include spectral sequences. I think reading both Spanier and Tom Dieck is a good idea, because their approaches are often similar. I once read that Spanier "was written for a computer, not for a human", but for me it is very readable. I recommend to supplement your books by a book on classical homological algebra, say the book by Weibel. (You say that you had graduate level courses in algebra including CT and HA, but from this it is not clear whether you really know some deep stuff, or merely diagram chasing and a bit of talking.) A nice book which is somewhat similar to Spanier and TD is Dold's Lectures on algebraic topology