One of Liszt's biographies? Only two reliable ones were ever written: Lina Ramman's and Alan Walker's three part biography. LR's can be found online with a bit of hunting; it's in two (large) parts and was written pretty much hand-in-hand with Liszt since he corrected and added to much of the manuscript she wrote, plus answered her questions that she sent.
Worth reading, as are all his student diaries. I am proud to say I don't think there is anything on Liszt I have not read, (or Cziffra, read his biography: Cannons and Flowers) - but rather than just internalising it all, I do my best to apply it to my playing and compositions and practice regimes.
Good luck and contact me for anything in particular. I'm here in Budapest, help out at the Liszt Museum when required (and visit when I can for a dose), and would be delighted to push you more into the world of Liszt.
Start with this documentary which indeed goes to the aforementioned museum!
