A new book on the subject of the Colpitt’s Oscillator was just released on Amazon. This is a small book (text wise) but with an extended coverage of the subject for hands on work by engineers and students and other interested readers. It is very economical as far as the text and mathematical derivations go but supported by javascripts and a very extensive list of references that causes the virtual footprint of the book to be fairly massive. Interested readers may pick it up from
Colpitt’s Oscillator: Theory, design, simulation, references: Rehman, Mr Ain: 9798406680810: Amazon.com: Books