u ve saminatha iyer did the firt compilation of thevara sthalangkal. the book is still available near ajantha hotel
the travel info is outdated but you get some nice facts the next one was ra.ye.so who did a book on both shaivaite 275 and vaishnavaite 108. the book is being printed and distributed by AC muthiah and family of spic
the best book for shaivaite 275 is now thirumurai thalangkal by jaya senthil nathan aasthana pulavar at kanchi mutt and published by varthamaanan @ north usman road. comes with a map and upto date travel info.
also read thennaattu koyil kaL by m. radhakrishnan( f/o indian bank gopalakrishnan) published by alliance. 4 volumes . lots of info
sozhanaattu thirupathigal by subbu reddiar many volumes is also good. published by avvai pathipagam.