Yes - and I've just remembered a 1959 biography by James Burnett in the "Kings of Jazz" series.

There's a hugely expensive but definitive bio by Evans and Linda from 1998.

Dick Sudhalter was a great cornet player - do you remember his re-creation of the Paul Whiteman Orchestra in London around 1974-75? They did a one-off concert at the Roundhouse and one at the Fairfield Halls in Croydon - both superb! I believe Dick dies not that long ago.