Certainly a relevant book for Chemical Engineers

Quite relevant since you may be designing chemical reactors with Levenspiels book, the rest of the chemical plant needs to be covered.

Going into the foundations

Good textbook on transport equations e.g. heat transfer Navier Stokes etc.

Students reading Chemical Reaction Engineering will no doubt come across Perry's Chemical Engineers Handbook in the course of their studies, it is a well known handbook now in its 9th edition, a testament to its popularity.

Chemical Reaction Engineering is a must have for Chemical Engineering students, who no doubt have look through Perry's Chemical Engineers Handbook often.

Typically in Chemical Engineering transport phenomena is only half of the story: some chemical process is going on inside that material that is transported around, for that Levenspiel is highly regarded for doing the basic calculations for chemical reactions.