I rate Bob Dylan as the best in pop/rock history, however his initial reputation was as a folk/protest singer, then many top artists put out his songs and he came to the forefront in the music world.
I know loads of Dylan from Peter, Paul and Mary, The Byrds, Joan Baez, Manfred Mann, The Searchers, Johnny Cash and Neil Young.
For me The Hollies are an unlikely band for a Dylan project, but I find their versions are well produced and provide another view on some great songs.
When this came out in 1969 some songs had not been put out offically by Dylan, some later surfaced on the 1975 release Dylan/The Band The Basement Tapes.
If you like Dylan give this a try, if you also like The Hollies, you can't go wrong!