If you'er already a pilot and converting to jets---I recommend the following as must reads--
1. Handling the big jets --D.P Davies
2.FAA --Pilot's handbook of aeronautical knowledge
3. FAA --- Airplane flying handbook
4-- Caveat--not everything applicable to other countries---FAA-- instrument procedures handbook---
also perhaps FAA Aircraft Weight and Balance handbook
and
learn to use the CR-3
between those three booklets there's everything you need to know
PA